Look at it from his point of view. You raised pre-flop; now you're "stabbing." While I'm not sure what the best play is on this street (call / raise x?), I'm pretty sure it's not folding. TPTK is a solid hand and he's just minraising.

I guess I'd call and then analyze his (inevitible) turn bet. Does it reek of bluff or monster (2 pair / set / flush) ?