Iran Is As Good At Asymmetrical Warfare as The USA Is At Dropping Smart Bombs. So...

...is this the best time to appoint a punch-drunk baboon, who challenges people to fights on the Senate floor, as they guy in charge of Homeland Security?

This is a WAR with Iran. The United States has no equal when it comes to dropping smart bombs, and taking out buildings from 30,000 feet, but that's only the first round. As we saw, at least THREE TIMES BEFORE, the second round is the asymmetrical warfare round, of which Iran has no equal.
Hamas, Hezbollah, etc. taking hostages, assassinating people, and cyber-hacking computer systems, and shutting down electrical grids that coordinate infrastructure. The next phase of the war will put Americans at risk, both at home and abroad, more than ever before.

In light of that, is it really a brilliant idea to put THIS clown in charge of Homeland Security? Sure, Trump loves a showman, and a loyalist who 'fights' for him on TV. And he usually picks out his cabinet by watching TV. But Trump has 24/7 security details. If you don't have your own security detail, this should worry you.