As you have highlighted recently, you have more internal knowledge due to your, IIRC being located in the east? In your opinion and this is not inflammatory but a genuine question,
No worries mate, I'll try to answer best as I can, but honestly it's just my own thoughts, speculation based on various sources and based on 'history repeating itself'
Do you believe, that his assertions of the Ukraine being occupied by forces outside of Russia,
No I don't believe it's occupied by external forces (not counting Russia ofc), influenced though definitely
hold any weight at all, there is I understand, an opinion held by a few that the Obama administration had factored in a tactical benefit of Ukraine being a NATO member and thus creating a "puppet" governmentw with Zelensky(controversial and tin foil hat firmly on head!) at the head of it, given his lack of any political background, was he a a "placement"? its not like the US have not done this type of thing before.
The 2014 coup/revolution was definitely influenced in the US, as was the government that came into power post Maidan, Victoria Neuland then secretary of state is on record discussing effectively who'd be 'our boy' - in a leaked confidential conversation. and it played out exactly as she stared it should.
But that was years before Zelensky came into office, and he's kinda originally the figurehead for Kolomoisky - so no way imo a US plant etc (the public face of Kolomoisky yes though) although think his support kinda got supplanted by western support and influence over time. Kolomoisky is as bad as any of the first wave Russian oligarchs imo, finger in every pie and a big source of the corruption inside the country
Are the baffling words of Biden and Truss, in the war rhetoric/sabre rattling perspective, a dangerous escalation and have provoked Putin even further, a dangerous game in my mind given the geo political machinations are way beyond my brain to fully comprehend.
I don't think a lot of the western leaders understand the situation as well as they should (Truss is an idiot and Biden arguably verging on senility) both I'd guess are more enacting what they're advised too by 'deep state' and think tanks - Europe when you look at it is lacking a figure with political nous or gravitas as it Canada, US, Australia, I look around and don't see a Merkel, Schroeder, or even though I hated her (a Thatcher) or Bush Sr etc, guess the closest would be Macron but right now he's looking impotent on everything - the European policy rather than coming from the France/Germany traditional decision makers seems to be driven by the newer more eastern countries (Poland, Baltics etc)
Provocation is a tricky one to answer as it just sounds like I'm excusing what happened because of it, so I'll just say many of the very very astute realists like Mearscheimer, Stephen Walt, Waltz, the now sadly deceased Cohen all predicted a long time ago before Crimea that Ukraine would be the flashpoint of a new conflict if certain things continued, all the way back to Keenan it was understood in essence. So what's happening was not only predicted, but the events that would lead to it where clearly spelled out by these and others.
Realism is founded on not looking at the world as you'd like or want it to be but as it actually is and policies and decisions follow from that basis
Will Putin act on his assertions?
One thing I don't think Putin does is bluff mate, which is why it's very worrying
Markov tone was on the defensive but assertive side and as you say losing his Daughter recently has given him just cause to be slightly unhinged in his assertions, are they really looking to escalate this, in spite of his protestations to the opposite?
He's a crackpot
What line of succession does Putin currently have in place that would see him replaced by a similar mindset in the event of his demise?
Simply put there isn't one remotely in place, should it happen it'd likely be 'the strongest' seizing power, which would mean a very hard liner. But Putin has pretty much complete control throughout all structures and there's nobody even in the background as a viable option IMO.
No chance of it being one the west would like to see there, Russians still remember Yeltsin far too well for it to be tolerated again (didn't fully understand just how hated Yeltsin is in Russia till I lived here - Gorbachev too is really not well remembered)
Sorry lots of questions, as you would imagine, given the brinkmanship of the Russians and dare I say it Truss and brain dead Biden!
No worries
*edit, it was Dugin, not Markov. So Markov is a nut job then?
Yup a grade A one