It seems to me that the concerns about face-to-face communication though they may be held very sincerely are really excuses. Blind people cannot see other people's faces, yet they manage to interpret other people's emotions and intentions through their voice. You can, of course, smile at someone if you cannot see their face, and if you are really smiling, you will communicate that in your voice.
It also seems to me that if sisterhood, as a feminist value, means anything, it means supporting other women as they are and on their terms rather than trying to dictate the terms of that support. Support for women is nothing if it is conditional on them changing in order to correspond with your ideas about how they should be. One of the things that we could do is listen to Muslim women about what they think and, instead of trying to prove them wrong, do what they are asking.
If I were a Muslim woman reading this thread, I would feel that I was being got at, rightly or wrongly, and it would be very hard for me not to become defensive. I think this is the lesson of France, where banning head-covering in schools has in fact worsened already fragile inter-communal relations, and produced aggression on one side and defensiveness on the other.
We all get angry, as the OP has, about things that other people do. One possible response is to let it out, and feel our anger as justified, and seek more and more justifications for it. Bu this just fuels anger and divisions and defensiveness. Might it be better to walk away from the anger?