Sikhs also provide free breakfast, lunch and dinner to anyone of any faith at their temples.
Maybe mosques should open its doors for some homeless people to sleep in. I doubt this will happen though. I think it's heartless that some mosques have signs that say "you can't sleep here", suggesting that Sunnis who fell on hard times tried to sleep there.
Sunnis should reach out to people of different faiths and be more nicer. They are the unkindest people of any faith.