Even if most defaults were in areas where illegals roamed it wouldn’t prove anything.
First, illegals couldn’t get sub prime mortgages. Most mortgages require proof of citizenship, like a w2, which requires having a social security number.
the only loans that illegals could get were ITIN loans. These made up no more than one tenth of one percent of all loans.
to try and blame illegals is the height of conservative partisanship.
Rather than indicating illegals getting loans, it might indicate that citizens (often with marginal credit histories) saw an opportunity where they could buy a house and rent to illegals. When job opportunities for illegals evaporated, so did the cash flow for the people renting to them.