I think anyone is "allowed" on this forum pretty much, as long as you're not misogynistic/promoting abuse of women etc. But you probably just have to be able to tolerate reading people be rude about your religion. I don't think there's anything wrong with people expressing vitriol against Islam, personally, but I get that it makes religious people uncomfortable to have their beliefs questioned. It's good to learn to live with that discomfort in order to have honest conversations.

If you can't handle hearing insults to your religion because it supersedes your respect for other women and their rights, maybe you don't really care very much about women's rights. Most religions are highly misogynistic and patriarchal, but not every woman is going to have the same negative or positive experiences of any given religion. You may find it difficult, but if you care about having integrity as a human being, it's worth confronting why your religion is so horrible and harmful for so many people, and whether you are complicit in that by practicing and defending it. Do you just excuse parts of your religious text and dogma and practice that denigrate other human beings because you feel they can be ignored, because you feel like it's just an old book, or because you actually think denigrating other human beings is OK? Or have you just had a much different experience of that religion than people in other countries, families or sects?

I can't answer these questions for you but they're worth asking yourself, in my opinion. It's up to you what you do. This shouldn't be a space where women have to shut up about women's issues to prevent offense to others, though - that's why we ended up here after being kicked off reddit.