Kill Pot Flopped Nuts

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20/40 kill pot hand (30/60 now)-loose aggressive game.
I have J9o cutoff. I played it for reasons I can not explain.
The SB has the kill. 1 EP, 2 MP limpers, I limp, SB raises, limpers call. (All players are average or below, loose and faily weak) 6 handed...360 in the pot
FLOP QT8...QT hearts
SB bets, EP raises, both MP call. I three bet. All call.
Turn Black 3. (QT83-two hearts)
Checked to me, I bet. All call but the SB.
River 9 diamond. (QT983-no flush)
EP checks, MP bets, other MP calls...I raise it 35 more all-in, and everyone calls.
3 way chopped pot.
I post this hand because it was discussed at the table for a little while. The guy to my right told me he didn't understand why I didn't wait till the turn to raise and try to knock someone out. I felt my decision on the flop was pretty simple.
Any thoughts?
3 way chopped pot.