The most irrevocable of these inequalities is that between man and woman, because the others can be overcome – the slave can be freed, the non-Muslim can convert to Islam – while woman’s inferiority is irremediable, in that it was established by God himself. In Islamic tradition, the husband enjoys an almost absolute authority over his wife: while polygamy is permitted for men, a woman may not have more than one husband, may not marry a man of another faith, can be repudiated by her husband, has no rights to the children in case of divorce, is penalized in the division of the inheritance, and from a legal standpoint her testimony is worth half as much as a man’s. So true. With this overwhelming evidence of Islam's depravity towards women, you would think that feminists would be screaming for Islam's repudiation. But, they are not. Why?
Quite simply, feminists see Christianity as their greatest threat. There may be a myriad of reasons for this, but one of the strongest arguments is that Christians are the most vociferous critics of abortion - the sacrament of feminism.
I think Feminists go after Christianity for the same reason everyone else does: it's a soft target.
With 80% of the US population holding some sort of Christian beliefs it is also a nice demographic if you are trying to get a message out.