Hi Best mum. I'm white English living in a mostly black area. I work in a mostly Muslim area. I don't have anything specific to say, I have just come on to say I am so sorry you are feeling like this, it sounds horrible.
Since working in a Muslim area, and getting to know some of the Muslims very well, and becoming good friends, I have heard and seen how some of them are treated. It has been a real eye opener to me. I have been horrified, furious, and very very saddened about what happens to my lovely friends.
I am also sometimes a bit nervous, and have been on the receiving end of some aggression from some Muslims too.
I think there is a lot of racism, far more than I would have thought, and possibly it is growing, although I don't know if that is my perception or reality.
Not every incident is racist though. You just can't tell, that is the problem. Half of the problems you are having might be down to racism, more than half, less then half, most of it, almost none of it......
I am being completely honest about my own experience, in the hope that it helps you, so please don't have a go at me.
My worries about going into the home of even my best Muslim friend, or looking after her children, are along these line.
What language is spoken? Will the child say things I don't understand? What food is eaten, can I offer the child an ice cream? or can we duck into Mcdonalds for a snack? What do the children call their parents? Do I say "your mummy?" or is this wrong? What might I do that is "wrong" that I haven't even considered? What clothes are offensive? should I wear tights? What will the rest of the family think? Will her husband disapprove of our friendship? Can I even ask these things, or would it be rude?
I think meeting in a neutral place might give me a chance to get some of these questions answered.
Meeting in a neutral place and spending time together does give thee other woman a chance to get to know you. It might just be that she doesn't let her child go with anyone she doesn't know? or she might be basing her reaction on her personal chemistry with you, or on racism, and if it is either of those I am sorry, both are hurtful, and almost impossible to tell apart.
Living in a black area, we have had some issues, but on nothing like the scale that you are having.