Not really. Putin is both very popular in Russia and also secure as President for years to come having just been voted in for another six years. How this assassination attempt plays at home for him, is a trivial matter. What does matter are the economic and military fallout. Sanctions have been introduced as a result of this and have large and practical effects. It may be used to justify further military posturing against Russia by the West. The fallout for Russia of the Skirpal poisoning is - on an economic and political level - wholly negative.
For Russia, perhaps. But not, as you yourself note, for Putin. It's politically useful for him, since it suppresses dissent. His enemies die even when they have fled to another country, so don't be his enemy. In addition, the sanctions were not a known outcome of the assassination attempt and military posturing is just posturing and is also politically usable for Putin (and therefore useful for him, since he's very good at politics).
Putin ordered the invasion, conquest and annexation a large part of another country. He's clearly not very concerned about what other countries think or what they might do. Assassinating a few people would generally be expected to come further down the list of international incidents than invading, conquering and annexing a large part of another country.
Thanks. For the third, this poisoning HAS been done in a deliberately showy manner, imo. There are much quieter ways to kill someone. Every doctor I know could kill someone more discretely than this. Whilst it could be a botched attempt, even done successfully it would still be very showy. There's a very clear "message" element to this assassination attempt.
Which would be equally applicable to either potential motive - Russia or a false flag operation by another state.
But we know that other countries have made similar weapons. Iran made five different ones in association with the OPCW. (Dowie inserted "allegedly" in there earlier. I don't know why - it's widely known and on record). The point is that if it's possible to make some, then it establishes you don't need to be Russian to make any of them. The UK has had forty years to research and test these things. It's inarguable that Britain could have made this.
Could have, yes. But there's no evidence that they did. There's also no evidence of the UK using toxic substances for assassinations. Russia, on the other hand, has made this particular chemical weapon and has used toxic substances for assassinations.
Going to dispute that one. Where is the risk? People can accuse and doubt all day long, but there have been outright lies told by UK governments (Libya, Iraq to pick recent examples). Everybody knows they are lies. No heads have rolled. The risk to saying "Porton Down - please supply us with a small vial of X. Agent Y, please go smear some on Skirpal's door handle" is neither elaborate nor something that any senior politician is likely to receive blowback for.
Murdering a person under the protection of the UK in the UK would be an own goal for the government of the UK since it's an obvious failure to provide the promised protection. This attack is harmful to the UK in the short, medium and long term because it will put people off providing information to the UK intelligence services.
That's true even if it was a false flag operation and was successfully concealed. If it was a false flag operation and not successfully concealed, the repercussions would be severe. Incorrect information about other countries that can be blamed on faulty intelligence gathering is very different to an explicit order to use chemical weapons to murder someone in your own country solely to blame it on another country. Dragging numerous other countries into it would have course make the repercussions much worse.
That's not the alleged motive. The motive is economic sanctions and - potentially - military justifications.
Since neither could be known, the alleged motive would have to have been the one I stated - to slightly worsen the reputation of a regime that already has a terrible reputation. That would be the only predictable result of this hypothetical false flag operation. I'm surprised that any other country did anything in response.
A false flag operation by a state hostile to both Russia and the UK would be more plausible, but still a big risk for a minor worsening of Russia's reputation and some harm done to the UK's intelligence services. The risk to another country would be higher because the effect on their reputation would be worse and/or the predictable repercussions would be worse. If a powerful country did it and were found out, the loss of reputation would be worse because their reputation would have been much higher than Russia's. China, for example. They probably could have done it, but even if they were willing to use chemical weapons for assassination their motivation to do so is very limited and why would they take the risk of being found out? If a less powerful country did it, they'd be running the risk of military intervention to force regime change.