You make some valid points in #’s 1 & 2. As to #’3 & 4 he made it an awful lot easier for the speculators and irresponsible borrowers to get the credit they never would have had access to in the first place imo. And to say “they” (notice not HE) didn’t know how bad it was is total b.s. They/he knew damn well from the reams of data streaming in and news reports of unverified income / savings going on during this time. They have access to all the reports in order to make their monetary decisions and there was probably a lot of water cooler talk going on in the Fed building as well. Some of these guys quite possibly made money flipping a house or two here and there and that word gets around quick. You’d have had to been on Mars not to pick up on what was going on.