Strength and weakness are relative things. If other Presidents of major powers were touring the world acknowledging their nations past errors, over and over - then OK. But that's not the case, is it?
Now, compared to past Presidents, and Presidents of other major nations, our country appears weaker - and yes, terrorist groups and other nations, watch and analyze what the President says, and how he says it, as well.
For example, Saddam Hussein DID believe, based on the comments of the President and Sec. of State, that we would not intervene with his take over of Kuwait, militarily.
Are you arguing that if we appear weak, we're really improving the odds for peace (peace through weakness?), and the nice terrorists will leave us alone?
That's REALLY interesting logic you have there!

Worked really well when the UK tried it when Chamberlain was in office, and tried it again with the Falklands, didn't it?
Care to try it again? Is there a certain number of lessons needed before you learn it's not working?