If some nato nations put their own soldiers into Ukraine independently,how do you think Russia would respond?I doubt this would happen but politicans in some countries can be unpredictable but I would like to know the opinion of a Russian person.
Personally, I do not see any big and fundamental difference between the supply of military equipment and intelligence by NATO countries and the direct deployment of troops. Trying to distance yourself from participating in the conflict is laughable if your reconnaissance drone is coordinating your maritime drones and they are attacking a Russian warship in the Black Sea. The only difference between a NATO-Russia proxy conflict and a direct NATO-Russia conflict is that instead of NATO soldiers, Ukrainian soldiers are dying.
It is surprising to me why at least 10% of all NATO military assistance to Ukraine does not go in the form of direct targeted cash assistance to finance the Foreign Legion operating on the side of Ukraine. With better funding, which Ukraine obviously cannot afford, instead of the current 10-15 thousand bayonets, there could be 100-150 thousand of them and this would be a much more serious force.
Also in your opinion do you think this war could escalate into a nuclear confrontation and what might be the cause of such an escalation?
Yep. The potential for non-nuclear escalation in the supply of arms is almost exhausted, even the supply of a hundred or two F16 fighters, which Ukraine so dreams of, will not noticeably change the current balance of power and it is not in favor of Ukraine. Then either peace talks on Russia's terms, or the entry of a NATO peacekeeping contingent with its subsequent defeat, or an exchange of nuclear strikes between the US, UK and Russia, I think everyone will get it.