The key to the hand here for me is the raise to 100 post flop.
As junglecat says its a conversation that is going on here. The weak lead is clearly a trap (now we can see the cards), which you fall for by raising it 1K.
This leaves the question if you are already pot-comitted at this point - with 1800 already committed and 2.3K back with blinds of 100/200 then I would say no, but it is a marginal call. For me it shows that the 1K raise was too big, and probably a bad move. A call here wouldnt be unreasonable (keep the pot small, and if he goes all-in on the turn then its easier to get away from it).
But you won it, so GIRUT.