Earlier quoted context omitted.
The attempted murder of Sergei Skripal by Russia is a conspiracy theory? Who else would poison him with a nerve agent? Who else would have the motive? Who'd have access to such an agent?
What would be Putin's motive in the case of Skripal? And if he really wanted him dead, there would have been a thousand other ways to do it without basically writing "Russia" with a spray can all over the body. To be clear, I'm not saying he didn't do it. Just that it's not as completely obvious as it seems. Why would Putin and Russia lose billions (because that's the economic impact of the West's reaction) to kill a…
Writing "Russia" in a nevertheless plausibly deniable way might exactly be the point though.