[gergery]

generally with that action you are up against 1)same straight, 2) better flush draw, 3)set/twopair. in which case you are basically even money so not much point to jamming the flop. so its often better to come alive on turn to jam. but with your flush draw, a small but significant fraction of the time two of your opponents will be on sets/twopair+gutshot etc. and your flushdraw will be live and your equity jumps enormously so its worth it to jam. as played raise the turn, you want to charge them to draw, even tho the backdoor diamonds means your equity is not huge. all depends tho, as if they are bad enough to not have sets on the flop alot then by all means jam w your straight no redraw)