It's called being a Sociopath With No Morals.

Lots of those have been crawling out of the woodworks and taking sides entirely based on the politicians from their favored political force taking that side, showing us that they have no Principles and Morals of their own whatsoever or at least that their own inate sense of Good and Evil is so weak that even the mass murder of civilians (including thousands of babies and tens of thousands of children) is less important to them than following the leader of their political tribe.

Any half-way decent human being looks at this and judges it based on the character of the actions that are being commited, and giving that it includes purposefully murdering children (to the point of literally executing them using snipers) its so morally powerful that most people are unable to not have a reaction of revulsion, but Amoral Sociopaths have no emotional reaction to even the murder of children and hence couldn't care less about that aspect of this situation, hence will just not understand "what's all the fuss about it" and/or just mindlessly "follow the leader" on it since the part of a normal human being's character that would be shouting for them to defend the victims and stop the aggressors, does not exist in such people.