[EnderFFX]

Ok first of all, yes a lot of flush draws will call that crap, but what you need to realize is more of the time you are giving at least 3 more outs because of the overcards to your jacks.

Second, you are getting more then the flushes to call you, you are also getting:

Overpairs, sets, two pairs, straights, etc.

Your raise on the flop isn't high enough to discount the trash people play. (I'm assuming this is a lower buyin tournament) Your ridiculous size raise only guarantees that people who dominate you, and flush draws, (possibly someone with a lone 4) is staying in.