So, Ukraine wants to be Democratic. That is in line with western ideology. Russia doesn't want that. They want the Soviet Union back. Ukraine was part of that Union. However, once the soviet union dissolved, there was some sort of arrangement that stated the countries between EU and Russia could not join NATO, they were a neutral zone as Russia didn't want NATO on their borders. Fine.
There was nothing stipulated about association status or good standing or trade with NATO. If funneling weapons were the issue, then maybe, just maybe, Putin should have worked to improve relations, trade more to Ukraine, entice them to want Russia back.
It doesn't sound like Russia did that. USA in particular saw this as an opportunity and saw it valuable and worthwhile to keep its Democratic Partner, Ukraine, in good standing as well as the other countries that went pro-democracy.
Hearing Republicans support the fall of democracy in a country is just... I don't have words for the level of "shock due to the lack of shock" I have for this position they adopt. It truly baffles me.