Ive lived in 5 states and ive never seen muslims giving dawahs. Ive seen one christian man who would come to our campus to preach and people would just ignore him. Thats the thing in America. They dont really care about religion even if its their religion. Also looking at london i think the brits are very nice to allow religions to talk with each other. America has freedom of religion but theres the unspoken rule of "keep it to urself". On youtube ive seen some muslim americans start preaching now. One guy named Uthman in San Diego now preaches to people and he has a youtube channel.