understand how they came to be in this crisis...their pleas for assistance started way back in time...even Obama was championing their cause by imploring Congress to open more visas for them before he left office...yet Donald Trump is on record for denying that expansion as soon as he took office (March, 2017) and what's more egregious, stopping any more processing of those that were in the pipeline.
Given that it must take several months of processing to clear even one applicant - of thousands that desperately wanted those visas - it is stupidity to assign all, or even a part, of the blame to Biden when all of this could have been minimized by the Trump administration having a) pushed aggressively for more visas and faster processing when he took office...and b) negotiating an exit date (in consultation with the incoming Biden administration) that allowed for the processing of all applicants...instead, they (Trump) set a date only four months after Biden's inauguration...Biden did well to extend it to September.
If you can't see the relevance here, then IMO, you're being willfully ignorant.