Can we care about oppressed women regardless of their faith?
This is very good question and in terms of thread feminists cannot make more than they make. It is incorrect to blame feminists.
In our civilization based on Judeo-Christian tradition it is normal that feminists criticize everything what threatens women's rights and fight for gender equality. In our civilization is entirely normal gender equality, democracy, freedom of speech, diversity of options, to be a believer or an atheist, etc.
But Islam is entirely different civilization. For example Islam forbids atheists, it is impossible to be an atheist in Islamic society.
I wrote, Quran cannot be changed, role of woman is determined in Quran and Hadith, and Sharia (Islamic law) is derived from Quran and Hadith.
Nobody in Islamic society, man or woman, cannot criticize or change Quran, it is strictly forbidden and consequences are very severe.
Feminists who originate from the civilization based on Judeo-Christian tradition have very limited opportunities to criticize what is happening in Islamic society. It is another faith, system, civilization, Muslim scholars can criticize them that to meddle in another religion, to talk about things they do not understand since they do not practice and do not understand Islam, to act arrogantly imposing their Judeo-Christian or atheist position to Islam, etc. For feminists who originate from the Judeo-Christian tradition is generally not correct to interfere in Islamic issues and question is how much they are competent for it. And after that it is clearer why feminists largely avoid this issues.
Who can? Muslim feminists. And they do. But again we must know basic rules. Muslim feminists are limited by Islamic rules. Role of woman is determined, Islam is male dominant religion and Muslim feminists can move only within these limits.
Different schools of Sharia law may have differences in interpretation. Not all schools think Muslim man can have four woman at a time, for example there is interpretation that he can marry nine woman. But all schools require that Muslim woman can have only one man for husband at a time. Or, Muslim man can have woman another faith but Muslim woman can be married to a Muslim only, if a non-Muslim man wants to marry a Muslim woman he must became Muslim. Etc.
The possible actions of Muslim feminists are very narrowed viewed from the side of someone who is not a Muslim. However civilizations are different, something that is logical and right in one civilization can be completely illogical/invalid in another. Someone can like or dislike Huntington, but he noticed that civilizations differ and it is objective reality.
Huntigton:
"Every civilization sees itself as the center of the world and writes its history as the central drama of human history."