Why can not? Don't you remember how America and Japan, once enemies, became friends? nothing is impossible, this is all a matter of politics, in politics there are no enemies or friends, there are only interests.
They became friends by force after the US dropped a couple of atomic bombs on Japan, so rather than becoming friends, Japan became a vassal of the US. We could only say that they were friends on equal terms many decades after the end of the conflict.
I hope that such ways of achieving friendship will not be experimented with in this conflict.
Yes, we know that it will take years to achieve "peace" but that doesn't mean there is no possibility of making peace. And I think that Putin is not stupid to carry out a nuclear bombing on Ukrainian territory.