The churches of the day were very corrupt. If you stay up late at night watching UHF TV stations you might believe that many churches still are. They have no clergy or formal religious hierarchy that considers itself more holy than others. Quakers recognized the absolute equality of all women and men, hundreds of years before it became fashionable. Quakers were also some of the first to recognize the immorality of slavery.
Quaker meetings are pretty cool, too.
They sit silently for an hour or so, meditating, until someone, anyone, feels moved to speak. Then they discuss whatever that person brings up. The Quaker's have strong beliefs of not participating in wars. Again, they do not see people above others. People generally do not hate people they do not know.