[Alexthegreat]

I could see him raising just so you can 3-bet, getting more money in the pot from the BB and also assuring him of a raise (or two) if his draw hits, because your 3-bet guarantees you are going to showdown with your hand, and not passively....

However, if he just said to himself "Joe has a huge hand, but I have a flush draw, I'll raise"...then he played it very poorly...