One very important thing - most of these animal type messages come from ruzzian government fake _bots_.
It developed very sophisticated methods to manipulate people, and of of them is instinct of behaviour copy.
It exists like in every species, natural mechanism of survive. Using same methods nazi Germany was able to create same level of aggression and pathology.
How this works: a sort of poll shows top managers that aggressive and violent people are more likely to support murdering Ukrainians. Ruzzian media get an order to work on increasing violence trend in society.
Now, main TV starts to circle anything which contains blood, like real crime records.
Bots in channels start to throw in like how should be pow's gored. Starts to promote MMA fights, and so on.
And some percent of Russians bites, copies this behaviour and converts to these nazi ruzzians.
That is how and why this happens. Now, this is not about nation. People do not have good protection mechanisms against this. It happened in Germany too, same level of aggression was demonstrated by Japan soliders in WW2.
Now, what
@Alex_1987 is saying is mostly completely understandable. Do not demand a reason from a person who without choice and without reason was put into that level on insanity. May be after all over, clearly not now.
With all that in mind, these are unimportant questions now. It mostly does not matter what will be with Russians (ones with two s), or even Ukrainian refugees. It is not top priority question.
Top priority is figuring out how in most efficient way to save Ukrainian soldiers. How to end this faster and in predictable way.
Very probably not all options are explored.
So wish one day we were back to competing who will do first step on Mars. Instead of trying to solve problems of prehistoric legacy of humans.