[GrunchCan]

I raise the flop big becasue the player you describe would also make this play with a draw.

The "he charged himself" argument doesn't make sense to me. He didn't bet becasue he was drawing, in the same way that he might call the same bet if you had opened the flop. If this is a CB, then he bet because he thought he had enough fold equity against you to make the bet +EV.