Because Feminism is not an academic understanding of social issue and make changes to it, it is merely rebel. For example, the reason the traditional gender role disadvantage women, with ideal such as "women should stay at home and take care of the children." is the result in during ancient tribe society, most job involving leaving the tribe, require better physical strength and been strong frequently is important in defending the tribe, during those era, where there are no professional trained warriors. Therefore, such roles was given to man, where women are given lighter job, as a result people start teaching their children "A man's job is to go out into the world to be the bread winner and defender, where the woman is to stay at home and take care of the children." then when the world start to change, the value associate with it, didn't change. But feminism don't understand this, instead they refer to it as a situation where men are suppressing women. It should be important to note for example, when women was first allow to go to university, there were in fact more women (including mothers) against women (including their daughters) going to university, most supporters were man, whom want to see a brighter future for their daughters. Also for example, during WW1, when Germany ran out of adult man, boys as young as 14 was send to fight on the front line, rather then adult women, whom are physically and mentally stronger, then little boys. (What type of people send children to go fight in one of the deadliest war in history, while the adult stay home at chill?) So, of course a lot of man are going to be offended by feminist.