I'm not sure, if we can call Woundwort a rabbit Hitler. There are some similarities, yes, but there are differences too. For one, Woundwort didn't kill or plan to kill many rabbits, who belonged to particular group just because they were members of that group. He didn't order killing masses of rabbit, who were under his power. As for conquest of neighboring territory to expand, he did conquer one warren, but he didn't expand his territory. If he did that, then Efrafa wouldn't have a problem with overpopulation.
I think it would be very fair to think of him as Hitler. Yes he didn't kill legions of rabbits but that's because he views rabbits as what Hitler viewed his own people. However the idea of the camps is also thrown into this mix since most of the enemies to a rabbit can easily kill it. I think Adam's did a fine job at portraying the nazi vision inline with how a rabbit naturally acts.
Yes the general did somethings that were unnatural to rabbits true, but he can't completely go against what he is. And in spite of it all rabbits don't really segregate each other on their breeds. To them a rabbit is a rabbit. So obviously certian things needed to be established in an altered way, but the line of Hitler and Woundwort is clearly there.
This is all aside from Adam's actually stating about the symbolism itself.
