They were playing any broadway and most pocket pairs. 

I knew that nobody hit a set on the flop and that they weren't likely to have a pair either, they were definitely fishing on the turn card. I caught a good tell off 2 of the players so I knew they had some high cards in their hands, nothing like K rag or A rag. When the turn card came down I didn't get a read to see if anyone connected but knew the flop was pretty terrible for the range I had them on.

In regards to stack sizes 2 out of the 3 villians had around $1000 each, I had $200 and the other villian had the same, maybe a little more. 

I didn't raise prior to the turn because I'd been watching them re-raise $100 to blow the short stacks off hands and smash their pot odds on draws. A K and Q were all in their range and as you know I only had a J so I was a little timid on raising too much prior to making the flush.

If I raised $25 pre and got callers (say 2), then raised the flop $35, which would of likely got me re-raised $100 I would of had to go all in seeing as I would of been so committed and I hadn't even made the flush yet.

Also $15-30 raise at the turn seemed to be the table standard to see 5th st too (when there wasn't much action preflop and postflop), I wasn't expecting all to fold as they were so agro they played through to the river 90% of hands previously. 

Is the advice here that I am not being aggressive enough preflop and postflop with a draw heavy hand?

I was trying a tactic that I heard on one of the old podcasts. That being my $15 into $64 looked pretty weak and just a position raise so I was hoping to get one of the deep stacks calling/raising me and then I would of got it in on the river.