I can only speak of my own experience. I have been a Muslim now for almost 20 years alhamdullilah. When I first embraced islam I was very welcomed by the Muslim community. I have experienced some issues, but I have come to understand that it was not just me, rather there is quite a lot of division among Muslims generally. Like for example when you go to a masjid and you see all the Pakistanis sitting together, all the Egyptians sitting together, all the Somalis sitting together etc. As a person who is a westerner, you can feel left out. Another example is the hajj, believe it or not. When I went last year and I was in Medina, I went to pray in the rawdah. The ladies who work/volunteer in the masjid announced that they would be taking us in by groups, which was a good idea of course in order to prevent too much pushing, people getting hurt etc. So they decided to divide everyone by nationality. So they had small signs and everyone was supposed to to find their group and then wait their turn to enter. Well I looked all over, and there was no group for USA, nor any other western country, like Canada or a European country. I didn't know what to do and then one of the volunteers came over to me and asked me why I was just standing there. I told her I could not find my group and when I explained to her my situation, she literally did not know what to do. I told her I will go with any group it does not matter. Finally she advised me to go with the "balad al shams" group as my husband is Palestinian. I did not feel it as a kind of discrimination, rather a lapse of judgement on their part.