Re: too aggressive?
 

[ QUOTE ]

Heres a thought. What if He doesn't have the jack?

He has as much chance of having an ace.

Now, The 2nd jack hits. If I Check , he is going to bet ANYTHING. He'd be wrong not to bet and ace, jack, 4 or flush draw.


[/ QUOTE ]

If you know he is the sort to try to take the pot away from you heads-up on the turn if you check to him, then you should check-call, and follow up by betting the river yourself. Your check-raise is too risky since your kicker doesn't play. So there is not much upside to your raise.

Your misconception is that you think that players are necessarily going to bet "anything" on the turn if you check to them. The weaker players will not and the better players will not. You are describing mediocre players here. In particular, a strong player is not likely to bet that turn with a flush draw. There are a few other made hands that a strong player would not bet there as well.

Re: too aggressive?
 

[ QUOTE ]
He has as much chance of having an ace.

[/ QUOTE ]

Which now likely beats you, or at least makes a split pot. He's also not likely folding to your bluff checkraise.

And why would he bet a flush draw?