1 Hitler's Brain Clones: We will create a machine to allow us to go back in time to prevent die Führer from being confined to die jar!
2 Monty: But you were only created because he is a brain in a jar. You'll destroy yourselves.
3 Hitler's Brain Clones: When we will have done what we soon will did do in die past, you will see die results of what we have now already will have done!
4 Monty: Uh... What?
4 Hitler's Brain Clones: Nazi grammar sneers at your limited notions of causality!

You didn't think the Nazis were going to restrict themselves to science, did you?

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2020-12-26 Rerun commentary: It looks like in the last two panels I carefully matched the number of arrows on the brains' speech bubble to the number of brains visible in the panel. But I don't seem to have been so careful in the first panel.