Look, you're a good poster, so there's no reason for any of these threads to escalate, especially when we're all in basic agreement.
However, that being said, I don't believe your definition is correct, especially about "war not being an internal affair". If that were true, then how come the Spanish civil war is called just that, a war. If you're not familiar with what occurred, it's actually pretty interesting. The tl/dr version is the military attempted a coup against the duly elected republican (communist) government. They failed in capturing/turning Barcelona and the north, but controlled the south. So the failed coup degraded to a knock out, drag out fight for territorial control until Madrid/Barcelona capitulated to Franco's troops. (https://en.wikipedia.org/wiki/Spanish_Civil_War)
Using your definition, it was not only was the civil war not a war, but the coup wasn't an act of war either. I think reasonable people can conclude that this is demonstrably wrong. A coup d etat is most definitely an act of war, in that it is a highly leveraged attempt at executing a revolution by merely decapitating leadership.
But this all just parlor room debating; the bottom line is the winner gets to dictate how history is written. If patriots prevail, then this was an attempted coup, therefore an act of war, ergo actions undertaken in levying, aiding and providing comfort all rise to the level of treason. Trump, tribunals and We the People will determine the terms - if it be treason, and Sessions, RR et al have any sense of self-preservation, then they are either highly confident fvcks, deranged lunatics hoping for a hail mary, or hopelessly lost in denial of the severity of the situation.
I neglected to add that if it be treason, then why, for the first time in history, should events pan out any differently than they always have when a defense of state security is mounted? To reference back to the Spanish (not a) Civil War, the retribution and retaliation taken against both sides was by any measure extraordinary. Entire villages and towns wiped out, thousands of priests & nuns rounded up and executed.
For the Hussein treason to be somehow swept under the rug, and everyone goes back to back-slapping each other after work at the local water hole seems pretty far fetched.
An act of war is not defined.