Really I think that is a bit simplistic. Spectric, your fellow mod, does have a point, however, I think this issue really goes back much further. Putin and his acolytes seem to resent the break up of the USSR that dates back to the Gorbachov / Reagan era leading up to 1991 and the Yeltsin / Bush period. Those in Russia who believe the dissolution and independence was a huge mistake, want to turn the clock back, and they have been taking steps to do exactly that.
I'm not sure that it's up to the US or the UK to tell Russia that it can't try to reverse the dissolution. We tend to see things through a western lens and consider that we know best, but many Russians would disagree and think we simply disrespect their perspective.
The argument that the EU and NATO have made matters worse by getting ever nearer to Russian / former USSR borders is a major factor for the Putin side, but tends to be dismissed by the western side. This dismissal of how the Russians feel may be seen by them as provocative.
I'm claiming zero expertise here, but I do think that polarised positions invariably skim over the underlying cultural and political complexities. We have no real right to impose our western position on anyone else. Borders have changed repeatedly through the centuries and are not cast in stone - they are just ink on a map.
Many would argue that Ukraine and Russia have far more in common than Ukraine and the UK say. I'm not expressing a view either way in respect of Ukraine, other than that the west may be trying to push water uphill here. Trump may well take a pragmatic view on fixing it and maybe we should wait and see what he actually does rather than speculating on what he might do. Ultimately we don't want a war with Russia. Our next world war will be nuclear and will be the last one the world and humanity sees. Our main focus has to be prevention - which is a big picture viewpoint.