No shit Sherlock. But they did concentrate their primary efforts (money, personnel, material, etc.) in Iraq for a period of time and are now doing the same in Afghanistan and Pakistan in conjunction with the Taliban. By doing so it limits their strike potential in other areas of the world - DUH!
Bullshit. What they did was grow like a cancer in Iraq. They didn't "concentrate" anything. Again, this is not a conventional force with a "main effort" and "supporting effort".
Furthermore, most of the evidence is that AQ in Iraq had few if any ties to Bin Laden, especially when it was operational.
Taking out AQ in Iraq has had little, if any, effect on Al Queda.
If you buy into that whole line of bullshit: "Fight them there so we don't fight them here." then you clearly have missed the bus.