The closer the brotherhood, the hotter the insults (see Serbo-Croats).
Serbo-Croat insult battle is next level - this is true. I forgot about them.
To be honest, what Ustase did is probably worse than what OUN-UPA did... so they may have a leg up.
Ukraine can measure it in... hmm... something else they think they're good at.
Ukrainians are great at hate. If Bhutan has a happiness index, Ukraine should have a hate index.
We Russians, say about the Ukrainians, that the aphorism that describes them best is - «моя хата с краю». This means, my house is on the end of the street.
Also, «пусть у меня сарай сгорит, лишь бы у соседа корова сдохла». Meaning - "let my barn burn down, as long as the neighbor's cow dies".
The difference between them and us, is we were largely rightless serfs, while they were greedy independent peasants.
Because we had nothing, it was easy for us to be generous.
Ukrainians on the other hand were relatively more wealthy, envious, and covetous.
Their national sport is getting heating up the hate to such a level, that their dips begin to explode sending them into the troposphere. Whoever goes higher wins.
Read the comments in their newspapers. They hate everybody. Their government, their neighbor, their boss, the West, Russia, the Great Horde, and Pope Innocent III.
Such a malcontented bunch.