If they’re for “logicistal support” that would tell me they are intended to speed processing by the Border Patrol.
And THAT would tell me the authorities DO see these people physically crossing over to US territory.
If they are on US soil, then US law applies and it’s likely they’ll be RELEASED into the USA, which means they won’t be leaving.
They need to be stopped OUTSIDE of US jurisdiction.
It looks like talk of shutting down the border might be BS...?