when the balance of evidence is on your side, you're not a conspiracy theorist for pointing it out. rather, it is the americans that are presenting a conspiracy theory, in claiming that the russians helped the syrians stump their own monitors.

the americans don't get some monopoly on truth, or something; a claim is not a conspiracy theory merely for questioning the official state position, and especially not when it is presented without proof.

the russians have the better argument. deal with it.

http://www.counterpunch.org/2017/04/06/on-that-gas-attack-we-dont-need-conspiracies-to-oppose-us-war-in-syria/