You have Trump as president who campaigned on reducing the US trade deficit and government deficit. It turns out there is a lot of fraud and to such an extent that it essentially makes the anti-immigrant sentiment look justified.
The US left cares about optics in a seemingly backwards way. They think exposing the fraud will justify racism and discrimination, so they deny that there ever was any fraud to begin with. This tacit approval makes them look like co-conspirators, which has worse optics than the bad optics they desperately were trying to get away from.
And yet despite these "heroic" attempts at cutting government spending and the mass scale fraud suddenly falling into the lap of republicans so that they can crack down on it, Trump has contributed absolutely nothing towards reducing the deficit. Instead, the deficit is growing so quickly Trump will be overtaking Biden when it comes to driving the country into debt.