Interesting that you bring up WWI, allegedly to back up your point. That was one war that the US could and should have easily avoided involvement in, but Woodrow Wilson's tropes about "keeping the world safe for democracy" and British propaganda managed to dupe a lot of people into seriously believing that the Kaiser's army was on the verge of attacking New York and Chicago.
You see the same kind of empty fear-mongering every time neoconservatives and liberals agitate for another war.
The Putin/Hitler comparison is ludicrous for too many reasons to list. Let's start with the fact that Hitler was an ideologue whose goal was the conquest of all of Europe and the extermination of entire ethnic groups. Show me something similar from Putin, either his version of Mein Kampf or any plausible scenario under which he'd launch an attack against a western NATO nation and I'll take your (and Hillary's) assertions seriously.
Putin doesn’t have the ovens in his master plan, but the means and the goals bear a striking resemblance. He hasn’t come right out and screamed that he wants to reconstitute the old soviet sphere of influence, but his actions make it clear that what he wants.
I’m not calling for invasion, military intervention or even useless UN sanctions (which was created to prevent what happened) but I was hoping we wouldn’t go limp-wristed when faced with a leader like Putin.