I'd only raise here if I think that this guy's hand range is pretty wide; meaning he like to shoot at a harmless looking flop (to him) esp. he think you tend to play bigger cards and believes you missed.

I would think that more often than not he either paired the flop (or better) or is on a draw (e.g. diamond flush draw, straight draw). I also expect to see sets pop on the turn and not bet straight out on the flop (at least check/raise since you pf raised).

I'd probably tend to call the flop and muck the turn if we don't have a redraw or improved. But if you think that you can get away with a free card play more often than not here, then by all means raise. If he has a 7, 8, or smallish PP, then he may check into you. If a nondiamond undercard falls, I'd expect a stop and go from him. If it's 50/50 for you to call or raise, I'd tend to raise since the BDFD adds a little more value to your hand.