We can only take so many and crossing the border illegally should mean they are sent back. Do it right or go home. We have the right and the responsibility to protect our borders.
Since when? They can do that at a legal border crossing they don't need to risk their lives swimming across a river. If they're crossing at a fence or at a river they're not going to go with a legal route ever.
Which part? The one that claims we don't have infinite resources because that's impossible? Or the claim that a sovereign nation has the right to defend its borders? Both of those things seem pretty fucking obvious to me.