The other companies gave no answer, which for any company that didn't have a history of inadvertently enabling genocide was IMO the right thing to do. Such political trolling really shouldn't even be dignified with a response, in general.
But you're right about IBM. Ethically speaking, they should have been the first to say no, given what happened the last time they helped with a database of everyone in a particular religious group. Then again, it is also possible that because IBM and its employees were not punished for their role in enabling the Holocaust, the bean counters that run the place would dutifully enable another one. Scary thought.