He doesn’t mention the fact that Sarai was an illegal alien. I’m not sure that any universal health care system in America would be able to cover every poor person in the entire world, but that is a reasonable extension of the argument he is making.
With Amnesty or just amnesty-by-neglect firmly in place this country would become rapidly the destination of last, then first resort for all the world’s poor and not so poor when we get Single Payer unless our Progressive caring Socialists shut off non citizens altogether.