Americans haven't been sitting around letting it happen. Not all, anyways. If you do not blame Russians for Putin, then it is pure hypocrisy to blame US citizens. Period.
I don't think the people taking your stance actually understand how poor and uneducated most US citizens are. The majority of people have been one paycheck away from homelessness for years. Even before Trump. The US likes to talk a big game, but it is nothing like the GDP would suggest for most Americans...
Again, if you don't blame Russians, yet do blame the US, you're simply being an ignorant hypocrite.