Open Question: Why should an extremely one sided movement like feminism be the basis of equality?

From Yahoo Answers

feminists clearly only look at one side of things, and only want to deal with women's problems. Feminists usually deny or try to make excuses for sexism against men but immediately freak out at anything that could be considered sexism against women. Also, why do feminists get mad when people speak out or question their movement? Why should we just allow feminists to push their agenda on everyone without any sort of questioning or notice?