Live - snap it off?

Whenever we see our opponent do something noteworthy we remember it, the question is what do we do with it? Here is a particular villain I went up against and the history I've seen with him beforehand in a 1/2 game. Assume effective stacks are all $1000.

1) Villain limps JJ on the button, SB raises $25, villain 3bet jams $800.
2) Villain limps AJs in MP, BTN raises $45, villain 3bet jams $1000.
3) Villain calls $25 raise with KQo. Flop QJ5, villain check-raises allin for $1000.
4) Villain limps CO, BTN raises $25, villain calls. Flop T22, villain check-raises $200 and barrels turn. Shows down T5s and loses.
5) Villain raises KK $25, cbets KTTr flop and gets raised. He hems and haws and gives a speech, then just calls. He check calls turn when his opponent jams. I think this is a key hand since it indicates he slowplays the nuts.

On to the hand --

Villain limps CO, BTN raises $25 w/AQo, villain calls. Flop QT4r. Villain checks, BTN cbets $75, villain snap raises $500.

Is this a snap call? Snap shove even? Villain seems to grossly overplay hands. I dont know if he thinks he's protecting against something or thinks these are value bets or what. He slowplayed the nuts before, but can a player like this feel the need to protect a set on a flop like this?

you just said he also reraised big with T5 on the T22 board so obviously its a call he can have you beat with QT, TT, QQ and so on but he has much more KQ, JQ, some AQ hands in his range. And you can maybe even discard QQ as he would have 3bet jammed it pre? But he is also capable of playing KK, AA, AK like this but you never know. This spots sounds like you have to call here.

i wouldnt fault you for calling.