This argument is weaker than it appears: for those not clicking through, it’s a comic that suggests that our current timeline is the result of somebody going back in time to assassinate a German politician in 1930 before he could… put in place fiscal policies that would extend the Great Depression for a few more years. Needless to say, the time traveler has never heard of Adolf Hitler: the punchline was “Why, what happened?”
Funny, except one big glaring question: Why the hell would you go back in time and kill somebody over a technical adjustment in monetary policy? Particularly since you could have just have easily gone back and, say, double-tap Josef Stalin. After all, if you’re going to destroy your entire timeline anyway, you might as well get as much of a karma offset as you can…