I mean, the Ferengi have been carefully designed to be irritating but come on!
Picard saying "I have reluctantly let members of a particular ethnic group on baord the Enterprise - hopefully they won't cause trouble" just sounds wrong to me and is not in keeping with the happy-clappy 'We are here to encounter new life and not judge' ethos of the whole show. Unless the ethos is actually 'We are here to encounter new life and not judge them unless we find them personally repulsive, in which case we hoick our judgy pants right up'.
I may be over-thinking this but I still don't find it nice to watch, which is upsetting as I'm an avid TNG fan :(