Bored on a Saturday so I'll take a stab in the hope that the request for info is genuine.
There are basically two theories depending on who you talk to:
1. Assad is an evil bastard who uses chemical weapons on his own people to basically try and end the war against the "rebels" in Syria as quickly as possible. Trump, like Obama before him, believes the world cannot stand by as such terrible (and internationally banned) weapons are used. The United States (and France, U.K., etc) have a moral imperative to act and hence the strikes against Syria even if it pisses off Russia.
2. Likely because of the announcement that we were to pull out of Syria in 6 months, the rebels or other players that would benefit from the U.S. staying in Syria carried out the chemical weapons attack. Either the U.S. is aware of this or has been tricked by the right people. Either way the U.S. cannot carry out strikes on the rebels, who we have funded, armed, and supported throughout this conflict. If we react then we must target the Syrian government who we have always blamed for the attacks.
Now for my opinions:
Whichever theory you subscribe to, it seems somewhat irrelevant who is in office. Obama did basically the same thing after Syria repeatedly crossed his "red line". The rhetoric back then was pretty much the same. So this really has no relevance to whether or not Trump is a "Russian spy". I believe that most likely at a high level there is still clear communication between the West and Russia about what strikes are coming and where well in advance. This was documented during Trump's strikes last year and probably was the case this year. In fact this most likely even means Russia is passing that information directly to Assad who obviously would remove anything he doesn't want destroyed. So really this whole thing is for show - a show that various players, including Trump, benefit from.
Though the proxy war between the U.S. and Russia in Syria is quite real, I don't think there's much chance of this escalating to a real war. The people that benefit from this show are the military complex (double whammy because both expensive warfare stuff is used but also now the U.S. will stay in Syria longer), Trump to distract from his issues at home, and the rebels now that the U.S. is probably committed to staying longer in Syria.