In that case it isnt coded language it is manipulative language there is a difference.
In the case of the pilots they were saying things that would cause people to beleive something contrary to what is said. "everything is fine" implies there is a reason someone might incorrectly think everything is fine and look for it.
In Trumps case its very different. His language didnt convery hidden meanings or coded speech, he didnt say one thing intending to imply another. He said exactly what he intended to be heard, and wanted to incite action (though not necceseraly violent action) as a result. Any reasonable person hearing his speeches before the riots wouldnt go "he just suggested everyone riot and break down the capitol".. a reasonable person would say "He wants to rally people into thinking there is election fraud so they will protest it and fight it, peacefully and gain so much support they will overturn it"...
That said I wouldnt be surprised if he did want violence, I just havent seen any evidence of that. What I did see was evidence of him saying exactly the results he wanted, for the population to fight for a recount and to get election results thrown out so he can win. I think he knows he lost and was being manipulative (and worthy of arrest) in doing so, but not for inciting violent, but for lying about election fraud to win an election.