Both the US and the world are different than when the republic was first established. Supporting Europe against Russian/Soviet aggression was the position of conservatives and the Republican Party since the end of WWII. It is a position still supported by many conservatives and Republicans.
I still believe in staying out of foreign wars…in fact I would like to see American trade with Russia ramp up considerably. Geopolitical power is better obtained by having an amazing economy that trades globally than giving Zelensky billions to spread around to his friends.