The past atrocities/countries that involved Russia, by your logic, were worth sacrificing.....They weren't facing Russia head in about.....So to with Ukraine.......No more complaints about those
Now you mention the ones that didn't involve Russia and we have agreed on those before,,they were horrible, how could the world and US just watch it happen......
So where do we draw the line or is the world ever going to...Are we always going to have a reason not to, then complain because we didn't....We can send a message now, bad guys beware, if we are willing to take Putin on, we will you too......