Shalom Revoltingest, to be sure, your points about the role of Congress is valid, but Fannie and Freddie played a major role in the crisis, as they held over half of the sub-prime loans, and that stems from Barney Frank's role as Chairman of the House Financial Services Committee, and from Carter's and Clinton's acts that they proposed in lowering borrowing standards to the poor, which as you point out, Congress did approve. The blame is mainly LIBERAL Governmental policies in which the Democrats were at the forefront to extend their "goodwill" to the poor and underprivileged borrowers.
Barney Frank, in August 2010, admitted this:
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I hope by next year we'll have abolished Fannie and Freddie ... it was a great mistake to push lower-income people into housing they couldn't afford and couldn't really handle once they had it."
And here is the mindset of how these Liberal elitist's think. Barrack Obama, as a young lawyer in 1995, was involved with suing Citibank for anti-discrimination for not issuing loans to poor African Americans in Chicago. Citibank finally caved and issued loans to Obama's 186 plaintiffs, to which only 19 (as of 2012) still owned their homes with clean credit ratings. Obama tries to blame Bush for the crisis, but he is really the pot calling the kettle black. Here is a link to an article explaining Obama's role in the financial crisis:
Obama's Role in the Financial Crisis
Do we really want our next President to be someone who would make Obama appear to be conservative, as Sanders surely would. Blessings in The Name, ImAHebrew.