I get what you're saying, we certainly don't want WWIII...
But I honestly cannot remember any other time in our history when any sitting President would allow this to happen more than once without ramifications.
And this kind of taunting from the Russians, Chinese, and who know who else in the future, is only going to get worse if Trump does nothing.
It happened while Obama was president...
And under Bush, and Clinton...
This has been going on since the Cold War, and it's not going to stop. All parties play games with each other, and while dangerous, it's nothing new.
Anyone remember Shane Osborn? Nebraska's State Treasurer has a bit of a history with this kind of thing.
does anyone remember when russia shot down a south korean passenger jet claiming it was a spy plane?