Were they right to be so pissed?

[hockey1]

I accidentally deleted the hand history from my e-mail, but the hand in question went something like this:

Party $109 SNG. 4 remain. Me (BB) and UTG have about 4500 chips each, button has about 600 and SB has 400. Blinds are 200/400.

UTG calls, SB completes (all in), I check with 95o (suits don't matter).

Flop is J92 rainbow. I bet 800. UTG folds. SB ends up winning the hand with Q9.

UTG, SB, and button all go BALLISTIC at me for betting the flop and driving out UTG, because that reduced the likelihood that SB would get knocked out. Were they right to be mad?