From my experience and in my opinion criticism of a religion, or any ideology, occurs when there is clear evidence of harm linked to some aspect of the faith.
Religions that don’t have much aspect of harm within them don’t receive criticism.
And in many religions, Islam in particular, there’s an overlap between cultural practices and what is part of the religion for specific historical reasons. I’ve been reading up recently about the burka for example and it’s a cultural tradition stemming from certain areas of the Islamic world. And other Islamic cultures and traditions and scholars do not subscribe to it, some even eschewing head coverings for women.
I found it very interesting to read about when France introduced the veil ban - it was slowly over a couple of decades, initially working with parents.
the impact was measurable in that Muslim girls began achieving more academically and in future careers, without it.
so it should be considered appropriate to politely and respectfully criticise such a practice, have the debates etc.
obviously this is more clear cut for fgm (and it’s important to note that fgm also occurred in Victorian western Christian cult for a while). I also have issues with circumcision, though obviously it can be a medical procedure that has to happen in later life for some teen boys.
Hinduism, Sikhism and Buddhism attract much less criticism. Obviously Judaism is very varied in the way it is practiced.
trans ideology wouldn’t be an issue if it wasn’t phenomenally harmful from all angles.