This is the same straw man argument above.You’re right. We should abandon our allies and let Putin run roughshod over Europe because it isn’t ‘Murica.
That isolationism sure worked out well for us the last few times we tried it.
First off, Putin can't run roughshod over Europe because his military is a joke, and his economy is much smaller than Germany's alone, let alone the rest of them.
Second, the world is a dramatically different place than the last time we tried isolationism (which, to be clear, isn't even what I'm advocating. Just a dramatically scaled down version of what we have been doing). For starters, global trade (and our ability to exclude countries from the "cool group") is a powerful tool that we didn't have before. Along with access to global markets, banks, technologies, etc etc.
If a Hitler 2.0 pops up, I'll be the first to say our policy stance should change, and we should rally our allies to all participate equally in shutting him down. But in the mean time, there's nothing wrong with doing the same thing every other country in the entire history of the world has done, which is focusing on using our tax dollars to improve our own country.