Who does a bunny represent here?

Here:

https://www.youtube.com/watch?v=522qtqjSagM

I assume it’s some politician, but my knowledge of WW2 history is too weak…..

Also, what do you think of this cartoon? Do you find it funny or is it offensive?
Of course, it’s incredibly racist by nowadays standards, but would you justify the making of this cartoon, considering the time it was made in (the 40s)?