Punishing someone for making art you think is insensitive or stupid is itself insensitive and stupid. While I totally support safe zones and things like that, their purpose is to allow someone who feels uncomfortable to remove themselves from that situation. This is an attempt to punish art and expression, which is the opposite of that.
I definitely think the trend towards suppressing speech on campuses is a problem, and that the people pushing for this person to be punished should take a long look at themselves.