Frankly, I just don't see putting the blame entirely on Bush. We've been headed down this path for many years and there is plenty of "blame" to go around.
I recall when I was looking to buy another house a few years back and getting approved for a $500,000 loan on an income that would NO WAY justify that. With a tiny down payment to boot. THAT was my first clue something was really wrong with the real estate market. I turned it down, didn't want to borrow money from a bank that was stupid enough to lend me that much!
The real point is: What are going to do about the crisis now? It's a pretty deep hole were in.