Last you checked, eh? Where did you do your checking?
Let's review some definitions for feminism:
"the belief that men and women should have equal rights and opportunities"
"the theory of the political, economic, and social equality of the sexes"
Which part of that do you disagree with that makes you not a feminist?
And, if being a feminist means one supports gender equality (which is what it means), how do you believe it can ever follow that not being feminist doesn't make one sexist? Seems like believing that people should be treated differently based on their sex is the very definition of sexism.
It is not often practical to use dictionary definitions to describe political or social ideologies. If we go by definitions, both feminists and men's rights activities should believe the exact same things.
I don't identify with feminists or men's rights activists today because equality is not those specific group's goal.
Simply because one supports those goals does not mean that one must self-identify as a feminist. I happen to support those goals and I also happen to identify as a feminist.
I can imaging many people who have not studied feminist theory and yet still believe in the principles you listed. Can we legitimately ask that they self-identify as something of which they have little or no functional understanding?
Feminists calling other people "not _real_ feminists" is a full-time hobby for some people. Some people even consider watching the drama to be a spectator sport of sorts. There are entire subreddits dedicated to just observing this sort of drama.
Some people, having been accused of being "not _real_ feminists" one time to many, stop self-identifying as such (even though their views on gender equality have not changed).
This is an interesting take on it. I had a conversation here recently with someone who wanted feminists to call themselves something else (like "equalist") because "feminist" has a bad reputation. Which, I think is what is happening here, too, only from the other direction: Men saying, "I don't want to be called a feminist because I believe people who call themselves 'feminist' are extremists."
I suspect the bad reputation is primarily caused by bad actors who are actually anti-feminist, and who don't want us to continue to move toward equality. 4chan has frequently leaked made up "feminist" rants into the internet at large, right wing Christians very frequently paint an extremely negative view of feminism, etc. There are plenty of people who genuinely oppose gender equality who will say or do anything to stop feminism in its tracks.
I used to be squeamish about the term, too. But, then I spent some time reflecting on why. And, the reality is that all the negative connotations I have about feminism (other than the anti-trans so-called "radical feminists" that even feminists make fun of) come from things men who are demonstrably against equality of the sexes have said or done.
The feminists I know (and I know a lot of them; I helped start a pro-choice activist organization here in Texas when the bills that are forcing closure of all but six clinics in the entire state were making their way through the state house) are nothing like the picture Republicans paint of them, nor are they anything like the caricature that some redditors and HN participants seem to believe is the reality. I don't know where these ideas even come from, honestly. The feminists I know are regular people, who see some injustice in our society and are trying to do something about it. They may occasionally be wrong on the details of execution, but they aren't man-hating bitches from hell, and it's really counter-productive to take the most extreme examples of anything and decide that the entire movement can be ignored because a few said something obnoxious.
To be fair, though, I used to identify as Libertarian. But, the bad apples within that movement seemed to overwhelm the reasonable folks; and there seems to be a movement of extreme right wing nationalists calling themselves "libertarian" lately, which finally put the last nail in the coffin for me. When "libertarian" came to mean "we need paramilitary thugs patrolling our borders to keep those illegals out" to the majority of people, it was time for me to opt out completely from using that label (not to mention the idiotic positions on climate change many self-identified libertarians take). So, I understand where you're coming from. I feel as though I've been robbed of an identity by ignorant nationalist racists. And, I guess if I believed everyone saw feminism the way you, and some others seem to, I don't know if I'd be as comfortable using the term.
I don't know what the right thing here is, but I know that there is a strongly anti-woman bias among many participants on reddit, and on HN, and it shows itself in all sorts of subtle and not so subtle ways. My most downvoted comments on both reddit and Hacker News have frequently been about sexism or racism or privilege (and occasionally about Apple, but I'll happily take those lumps), and I find it pretty reactionary and disappointing, but not surprising.
If the people who self-identify as feminists in practice actually believed that, life would be easy.
As it is, the perception to the vast majority of people is such that I find it more effective to avoid the word and simply advance the equal rights part.
Wanting to avoid associating yourself with the general zeitgeist of thought generated by soi-disant feminists is, annoyingly, quite reasonable currently.
"With friends like these, who needs enemies" applies a lot more often than I might like :(
Let's review some definitions for feminism:
"the belief that men and women should have equal rights and opportunities"
"the theory of the political, economic, and social equality of the sexes"
Which part of that do you disagree with that makes you not a feminist?
And, if being a feminist means one supports gender equality (which is what it means), how do you believe it can ever follow that not being feminist doesn't make one sexist? Seems like believing that people should be treated differently based on their sex is the very definition of sexism.