This is a ridiculous question and I suspect you're just trying to start shit but I'm gonna address it anyway.
The assertion that feminists hate men is at best a red herring, or at worst blatant anti-intellectualism. You also seem to be attempting to equate feminism and misogyny as moral equivalents; this claim is baseless and not rooted in logic or reality.
First, a proper definition of feminism is required. To keep things simple, feminism can be broadly defined as an ideological commitment to the equality of the sexes. That being said, this definition varies broadly across the many streams of feminism (liberal, radical, socialist, etc.). I suspect that your assertion that feminists hate men is rooted in a misunderstanding of radical feminism, which seeks to abolish the patriarchy and the concept of gender, both of which are examples of the many oppressive forces at work in society at large. You seem to be equating their hatred of the patriarchy with hatred for men in general, which is not true; the patriarchy is reinforced by everyone, everywhere, all the time, including societal institutions, by both men and women. Therefore, your claim that feminists hate men is unfounded and unworthy of further discussion.
Second, you seem to equate feminism and misogyny as moral equivalents; that is, if women are feminists, which, according to you, means they hate men, then men should be free to be misogynists, which can be defined as the hatred of women. While misogyny is in fact the hatred of women, feminism is not the hatred of men. As I've previously established, feminism is the ideological commitment to equality between the sexes. Therefore, feminism and misogyny are not in fact mere equivalents and cannot be compared in the way you've attempted.
Finally, I will address your last point; that when men behave as misogynists they are treated as if something were wrong with them. This is correct, there is something wrong with them. Misogyny is morally equivalent to antisemitism, homophobia, transphobia, racism, etc. It is a bigoted, hateful, unscientific, & unfounded belief and should be treated as such. This is worsened by the fact that men are in a position of greater power in society (due to the patriarchy) and thus, these horrific views are more dangerous when they are propagated by men. Following this same logic, even if feminism were the hatred of men, it would be less problematic than misogyny because women are an oppressed class, lacking comparable societal power to men, and therefore their ideas, even harmful ones, are weakened by the societal structure of the patriarchy.