The horrendous terrorist attacks in Russia this weekend are probably best ignored- given that media attention is what the perpetrators want.
Whenever there are terror attacks, there are usually conspiracy theories. 9/11 trutherism is the most notorious variety but other forms exist.
However there don't seem to be many nutcase fantasies about attacks on Russian targets. This hasn't always been the case- a lot of people were suspicious about the apartment bombings in the 1990s for example. However none of the Chechen black widow attacks over the last decade have caused the "just asking questions" brigade to ask questions.
Could it be that Alex Jones and other leading lights in the conspiracy industry have pretty much sold themselves to the leading buyer of inane fantasies, Russia Today? It is the pretty much the only professional media outlet that will put these idiots on air and pay them so it isn't a surprise that they don't bite the hand that feeds them.