As far as “minorities”, why do they deserve to own a home more than anyone else? It seems dirty to sell a home to people who can’t afford it based on their ethnicity and then have them end up being burnt.
As far as downpayments, you’re correct. Look at prices in Manhattan (where many apartment building HOA’s required 10-20% down) and Texas (where homestead laws encouraged larger down payments). No major downturn in 2008.