"Even more so since Russians and Ukrainians are brothers and sisters. They’re both of Slavic heritage."

See Turks and Greeks, Aussies and Kiwis, Japanese and Koreans, Taiwanese, and Chinese, Northern Irish Catholics and Protestants, Tutsis and Hutus, every ethnic group in the former Yugolslavia, and the many other similar groups that hate each other. It's like you are looking at an evil version of yourself in the mirror. A bad history is hard to get rid of.

The Ukranians should surrender immediately. They will spend the rest of their lives in refugee camps and ruins if this war doesn't end soon. They can't win it on the battlefield. One of the reasons why the soldiers can't recognize each other is that a lot of the uniforms and equipment they are using are identical, except that the Russian stuff is a model better. They were practicing with it in Syria.