What would be the easy way to disarm the tension between feminism and multiculturalism? Simple, give each person the same rights and, equally importantly, the same responsibilities. Regardless of culture, a woman has an equal right to her life as a man. Anyone found guilty of committing a murder should face the same sentence and condemnation, regardless of the victim or the murderer's motivations.
Of course, one could say that focusing on the commonalities of individuals, and hence allowing the past injustices done to groups by groups to remain in the past, would be throwing the multiculturalist and feminist babies out with the bathwater. Then again, once they got past equality and into greivance, those kids were turning pretty ugly anyway.