That is not the apparent conclusion of Trump, the state department, the Pentagon, UK, France, and others. Even Russia back off that, pulled their Navy out, and asked to participate in targeting. I think Israel has already said Assad did it as well.
Russia is claiming the UK was behind it.
Israeli officials: U.S. must strike in Syria
“Assad is the angel of death, and the world would be better without him.”
http://www.jpost.com/Middle-East/Israeli-officals-US-must-strike-in-Syria-549144
Who takes over then?
What you’re saying makes less sense than a liberal on drugs talking about the economy.
Assad had zero to gain and everything to lose by this. Unless he’s a complete and utter psycho, I don’t see this happening like they say.