Hunting prey animals for subsistence is moral and universally better than factory farming, for all parties involved, including the animals.
However, hunting predators for any reason outside of strictly regulated population control, is disgusting. Even grosser still when they're stuffed and displayed for tourists.
I hope it was stolen by like-minded individuals and destroyed.
These bears will actively and eagerly hunt you. However, at that point, from your perspective, it's probably no longer hunting and is now in the realm of self-defense.
Now for the big question: do polar bears hunt humans? The answer is, not really. One study showed that there were only 73 attacks on humans between 1870-2014, only 20 of which were fatal. Attacks were most often the consequence of hungry male polar bears, or, in some cases, females protecting their cubs.