We have a lot of Sikhs where I live and in the main, they're lovely people - very peaceable and caring. They make a big point of telling us that anyone is welcome in their Gurdhwara, and they will always offer food if you go. They also do a heck of a lot for charity, and not just Indian based charities either.
That's not to say I haven't met and worked with many people of the Islamic religion who are also decent, clean, hard-working people who would share their last morsel of food, their last penny with you.
I daresay there are a good many decent Christians out there too. Thing is, I don't seem to have met many of them yet. Actually, some of the loveliest 'religious' people I know are Pagans and Wiccans.