This is exactly the kind of stuff my place of employment, Hearts In Motion, is trying to fight by promoting human development in Guatemala.
We obviously cannot send them back. Not only would it be morally wrong, but IIRC a violation of international law to deport people who cite "a fear of violence or harm if they are returned" back. I agree with ChairmanSanchez: care for them, and possibly grant limited amnesty on a case-by-case basis.
But that's only treating the symptoms. We must treat the causes: drug cartel violence, abject poverty, and failing governments.
My position is not as moderate as it sounds, and is the same as Secretary Johnson's. Some people will gain entry to the country, but a vast majority will be sent back. I do have emphathy for them, but we simply cannot take all of them. And we need to start as soon as possible on securing the border further to prevent future arrivals.