One of the guys making these claims is not a 'leftist politician', he is a conservative economist on leave from a teaching post at the University of Chicago Booth Graduate School of Business.
Does he have a name?
Just so you know, I'm an MBA in finance and I spent a large chunk of my career in financial services, quite a few of those in New York on Wall Street both working for banks and consulting companies to banks. You throw out a lot of factoids, and it's a rat hole to argue each one. I don't dispute the stats themselves from what I saw, though they aren't really integrated into a story so much as they seem to imply a lot of different things that aren't strongly supported.
There were a lot of reasons for the meltdown. However, there is one reason for the bubble, government. Government flooded the market with free cash and pressed banks to lend to sub prime and everyone else. Your argument who they intended to target is irrelevant since the cash was not restricted to that. If you are intending to bomb Dresden and bomb the countryside, you don't get to say, doesn't count, I was aiming for Dresden...
So, with cash and lower standards, what happened is that people bid up the price of housing. Sub prime are also sub prime because they don't make the best financial decisions. They had the money, they bid up housing. With government funding it and people writing off interest on their mortgages and people leveraging ARMs to get lower rates and qualify for more $$$, housing shot even higher. It wasn't a market price, hence the accurately selected term "bubble." Government caused that, no one else.
Now with the meltdown, how it happened, I totally agree there are a lot of valid fingers to point, though your reluctance to point one of them at government is ridiculous. But in the end, arguing which loans defaulted is irrelevant, because there was such an incredible bubble which could only exist as long as the economy zoomed, at some point there would be a slowdown, and at some point it would burst.
Clinton started the policy, W continued it, they were both to blame. The Fed, which is an organized crime syndicate the government uses to steal from the American people, was right there with the politicians in setting up the American people. A true liberal would hate the Fed, they are a regressive tax. But liberals aren't liberals, you are authoritarian leftists, which is why you will blame everyone but government.
And my post you didn't address:
kaz said:
1) In functioning markets, there are winners and losers, wise choosers and poor choosers. The market fixes that by rewarding the winners and punishing the losers.
2) In government controlled markets, players act according to skewed rules determined by government because only government can use force to skew markets.
You're arguing that the entire market got greedy at the same time and simultaneously made the same stupid decisions. While they followed government relaxed lending policy and using government money.
A critical mind would question the leftist politicians making that claim...