TPGK and fd vs flop aggro

[ispiked]

Would he really be raising a draw in a multi-way pot like this? I rarely raise draws, but I'd be much less inclined to do so in a multi-way pot.

If villain does have a set here (which I think is the case a lot of the time), he's going to slow it down a bit if we just call and the flush hits on the turn, right? Wouldn't this be an argument for getting it in on the flop?