No one has a clue what Trump is going to do regardless of what he tweets. Mattis may not even know yet
Taking out Syrian airfields, C&C centers, and even aircraft will not hurt the Russians unless they are stupid enough to stand on the runways.
What would be interesting is if we knew where Assad stored his chemical weapons and blew them to hell, spreading “good cheer and love throughout the land”.
Assad doesn’t give a damn about bad publicity, only the Russians (oh so sensitive today while killing civilians in anti-Assad areas).
The US is probably going to do what the Israelis do, get firm intelligence and than use surgical strikes to eliminate the threats. Not hard in this day and age of lasers and computers.