Slightly misleading, he says that they should shoot at mexican cartels (which are now federally recognised as terrorist organisations) who are using planes and boats to smuggle drugs.
He’s still a price of shit who wants to eliminate rights though, but it’s always important to get the facts right.
He is saying that he would use American military equipment and possibly send troops to kill people who look like drug smugglers on Mexican soil, which is an act of war.