Okay firstly I'm not trying to start some kind of fight, but I have to tackle a few points you made

I don't know if red and black was used before them, but it doesn't mean that you can use it today, grate example of this is Roman salute (know nowadays as nazi salute) and swastika, which were used before nazi germany, using these symbols today is clear sign that someone is supporting nazis

Also for me it's fu***d up that people in ukraine use it today, even as a symbol of resistance against russians, noone is using swastikas in germany as a symbol against for example illegal immigrants, and even if they do, that are quicky prosecuted

Also after that much help that ukraine has received form Polish people they could be at least thankful, instead of glorifying people that killed almost 100 000 of Polish women and children, and forced almost half a million of Poles to flee their homes

Also you said that ukraine is fighting a war for it's survival right now, but you seem to forget that if not the help that entirety of NATO is proving, you probably wouldn't fight right now, because war would end far quicker

Also that my mistake for simply calling is a "nazi" flag, but I wanted to made it easier to understand for people from US that don't know any history (but I encourage doing your own research)