From their point of view, we are trying to kill them. From their point of view, we have been trying to destroy their country for decades. We (the US) even invaded them. There are a LOT of video and documented statements by US politicians, including our current president, to support their point of view.

In my opinion, the idea that Russia should just accept that if we in the West decide that they should no longer exist, they just have to accept it, is the actual childish bully position. The world doesn't work that way.