Are you saying that all 2+million are tested when they are let in? At least you admit that just letting people in the country during a pandemic is a problem. Thank you for that concession.
What do they do with those who test positive? Do you know if they are only flying non-positives to interior cities of America?...why are they doing that regardless?
But, lets assume that Biden is testing everyone before returning everyone to Mexico because the border is closed. (Obviously, that is preposterous, and no one believes that, even you I suspect. But, I'm entertaining you for now.) Is he doing that because he is a xenophobe or racist, like Trump was when he did it? Or, are you able to have a closed border and not be racist?
Ok, entertaining your preposterous idea is over. Obviously people are flowing across the border. Hell, we have video of them opening up the border wall to let people in. Why let them in during a pandemic. We can't trust you on this issue.