They have decided that hate of the other is more important than love of their nation. That sort of degenerate value system demands that they not only throw away their decency, but do so loudly and publicly to virtue signal their loyalty to the regime and willingness to disregard the truth that is in front of our eyes.
People are so cavalier about saying atrocious things online these days. The nice thing is that these comments are forever. They will never escape their words.