Haha.. To let Trump off!? You seem to forget who's the superpower, and it's not Iran!
The red line was crossed when a US citizen was killed, and that happened when the Iranians killed the US contractor.
The Iranians have been provoking the US for years, and Soleimani was rightly killed.
The Iranians begged the US not to retaliate after their useless missile attack, and now Trump will impose further sanctions on them. Trump is the boss!