Those policies were part of the country's economy when W took office. The CRA started under Carter, then Clinton took steps to force lenders to make the unsound loans. And the same policies continued throughout W's two terms. No one has clean hands on this, though I'd agree the Dims are about 75% responsible for the problems, and Republicans did make some attempts to patch things during the mid-2000s.
And there are those videos showing W bragging about his "ownership society" and about the increase in minority home ownership.
You people who keep droning on about "both sides" insure the Left will win this fight.