It's a matter of language.
Feminist literally means pro-female, which, because ale and female are seen as opposites means that pro-female implies anti-male.
As western society transitions to a less binary view of sexuality, we are also having to deal with extremist views being able to be broadcast to a large audience.
This is hopefully the rise of equalism. It works on multiple issues. The problem is that equalism is getting extremists now too. I call them the "everyone gets a gold star" brigade, and they are undermining the equalist concept by confusing people about the difference between being equal because of what you are rather than who you are.
It's all about choosing what we are happy to discriminate about. If you need to choose between two people, do you discriminate against the a***hole or would that be offensive to the a***hole community at large. Humans need to make decisions based on criteria about other people. The question is where do we want the line. A policy of full acceptance would simply lead to crazy, untenable decisions. (see Borat for details).
People like to say that we shouldn't discriminate against people based on what they can't control. What traits do we want to consider to be out of someones control? (see Dexter for details)
Most people don't even understand the questions, yet are expected to give answers on a daily basis. Add to that plenty of nutters with an axe to grind and all the terrain ends up egg shells covered in confused people that feel guilty but they are not sure why.
Send the feminist back to the kitchen to bake me, and the real women, some pie!
And guys, saying your a feminist will not get you laid. Try thinking instead.