reggae is a decent form of music, and people insult it all the time. What the real problem is is that people are unaware of what is really reggae and what isn't. any loser can quote bob marley but here you go
bands that are reggae: bob marley, the wailers, gregory isaacs, etc.
bands that are not reggae - slightly stoopid, sublime, 311, matisyahu, pepper, the expendables