Well Trump has claimed he is sending missiles to Syria anyway. Shiny ones at that.
Dangerous here. If Putin doesn't shoot them down he loses face. If he does shoot them down then that is a direct act of military force against US military force.
Russia probably feel like idiots for putting Trump on the throne now. They did it to make the US weaker, which it has, but his rashness and irresponsibility could make things difficult for them.
On one hand I like that Trump doesn't back down to Putin. Putin needs to be slapped around before he respects you, on the other hand I don't trust Trump to not go too far. You need someone more wily to go head-to-head with Putin. Trump is all black or white.
There won't be direct war between East and West but with stubborn aggressive idiots in charge of the US and Russia then Syria could become am even worse place as the two sides take their anger out on each other there.
A Vietnam/Korea for the 21st Century is a potential possibility.
It's just posturing mate. The Russians can't stop them so they sabre rattle. There's no missile screen in Syria.
Just like mouthing off about nuking north Korea if thry attack Guam... unnecessary but no harm done as nobody has the capability of backing the big talk.
When you see Russia walk off the posturing platforms get worried. Posturing is good. It's all a game.

It's also complete nonsense
You're all over the shop mate