Which group suffers the most discrimination?

I think it depends. There are places where racism is a really big problem, and others where it's virtually non-existent. Although, that said, some of these are much bigger problems than others on the list.

The poor, the fat and the mental.

Especially the mental (i.e. bipolar=bitches, shy=stuck up, anxiety=weak, depression = isolated etc.). Their conditions seem to make people want to throw blame on them for every little thing.

discrimination of blacks > discrimination of whites

Fat Mexican Jewish deaf lesbian dwarf war-widowed single mothers with Clubbed feet.

Animals, for sure. Take what happens to animals on to any other group, it would cause a war due to the racism/sexism, etc.

I posted this a while ago. Fat people won.

I'm pretty sure that everyone thinks adult babies are freaks.

The HVAC-L129er light/shadow creatures. Suckonthis9 gives them NO respect...him and his VHATC-L2 motherfuckers.

They'll learn. Oh yes...they'll learn.

The handicapped. Not discriminated as in insulted but it's impossible to treat them normally. You don't want to be rude, you don't understand them, etc. it's just a sad fact

I'd say the handicapped. Most of the time the discrimination isn't actually bad as with racism, homophobia, or most of the others, but it seems to be nearly universal.

Fat, gay furries with a diaper fetish, obviously.

how about diaperfurs?

huh i figured colored folks would be it.

I'd say mental disorder people. You see on a CV that someone has a history of depression or anxiety or whatever, BAM, straight in the bin.

South Africa has almost turned into Reverse Apartheid already.
The whole country is structured to disadvantage the whites.

It depends on each place but I'd say people with mental disordes as people just tell them "get over it" and don't treat mental illness as real disorder.