I dont think the borders were more open... I think Biden just allowed anyone who wanted to, to cross in caravans and claim refugee status.
Look at all the laws you guys have about immigration... the "Dreamers" Didn't Obama pass that? How it makes sense that just because you enter the country as a minor, you automatically get granted residency and a path to be a permanent resident, I'll never understand... I get it, it sucks to live in some countrys, and living in america is the "Dream", but it should be done through proper channels, and not just given to people because of a law. If you ask me, that's a lot more open / reckless than what Biden did.... A lot of previous presidents have made bad choices, I didn't like Biden... but I think he just inherited a problem.