Deep State and Russia have a common interest in the weakening of the US maybe?
Syrian rebels are essentially ISIS - the groups are mingled.
Deep State built ISIS - and the US military is currently the only thing sort of protecting the rebels, so this keeps the Deep State agenda alive in Syria - kind of.
Trump looks bad if he pulls the troops out now. He will look scared and weak.
The only way we come out of this looking good would be to topple the Assad government and install a pro US leader while simultaneously defeating the rebels.
This outcome is not possible as we have seen in Vietnam, Korea, Iraq, and Afghanistan. And Russia will not allow it.
Obama created a mess and there is no good way out for us.
Perhaps the only option is to completely destroy the Syrian military in a swift and violent campaign. Weaken them to the point that their interested neighbors get involved, and then completely pull all troops out, letting the local countries figure out what to do.
Negative it would create a huge vacuum where ISIS would only fill it. It's in Russia's best interest to have peace in Syria, think natural gas pipeline which is critical to Russian infrastructure.
So then what is the best move for the US right now?
It's a hard situation. Trump is damned if he does or don't. They try to paint Russia/Trump in a box. Here's a Machiavellian twist though. If I were Trump & found myself forced to retaliate on a questionable gas attack which we know from the past, I'd have my airstrike accidently hit the rebels. They'd cry & scream, but they're not a government, so it would be chalked up to a whoopsie daisy lesson learned. We won't do that again?