Should the invasion of our country be repelled with lethal force?

No, with signs pointing them to Canada. "Half way there, marijuana is legal in Canada!"

Almost all nations have military designed for just such an eventuality. One notable exception in history was Sweden's allowing Nazi military to sweep over their country in order to attack and defeat the Norwegian soldiers in World War Two.

Absolutely

It will be repelled by the hurricane coming to Mexico and the higher elevation of Mexico City.
Marchers already complaining of sore feet and children slowing them down.

I'd be O.K. with water canons , tear gas grenades , non-lethal rounds , tazers and dogs ,,,,,, but hey , whatever get the job done .

if you're referring to the caravan, absolutely not. there are kids mixed in there.

I do want it stopped, but I've got no freaking idea how to stop a group that large without putting those kids in danger.

Native Americans have already tried that for decades. Didn't work.

Illegal immigration needs to be dealt with, but your blood lust is a whole other issue. They're people just like you.

The arrival of necessary, essential farm workers, whom the U.S. needs to work on its farms, should not be repelled by any means, and should be encouraged as much as possible.

I literally don't see no other way. Unless you're talking about immigration. Then yes there are more cleaner way