That's a given. The question of intent was to establish whether he committed treason. As for most crimes, without intent there is no crime.
I wasn't clear enough...The question about treason is an important one. I only meant (as you pointed out) that it is a given that Arnett stepped into "it" and it will be difficult for anyone, even his supporters, to really take him seriously.
His supporters might pretend he has important things to say, but I doubt they would make any personal "life and death" decisions based only on what he says.