Every human/culture has likes,dislikes ...etc and every one expect others not crossing those lines for peaceful co-existence. In democracy, no doubt, there is freedom of expression but if that expression is uncomfortable to other, then there is responsibility to control/prevent that expression rather than brazenly going ahead ignoring sensitivities of others.
If the story line as I understand from mass media is, assassination of North Korean leader Kim Jong-un and if North Korea protested it, then Sony should have understand and accommodated the sensitivities of North Korea and stopped making this movie. It is not censorship as President Obama noted.
People on HN voiced concern on NSA surveillance ...etc, since many felt privacy/anonymity is violated...etc. Just like you have sensitivities, North Korea too has sensitivities and it is natural to expect, others to understand them. Whether it is, dictatorship or democracy and their relative merits/demerits is different point of discussion.
I am neither supporting hacker's attack on Sony nor North Korea but Sony in first place, should have considered the sensitivities of other cultures, even if they are alien to your culture and act accordingly, given the story line.
Arts should further enable the stability or peace on earth and you may not achieve peace by hurting sentiments of others.