We face once again the conflict between freedom of speech and the alleged right not to be offended.
There is an easy way, actually, not to be offended, and that is: Don't look at the offending material. That is the way freedom of speech works. I'm free to draw a cartoon, and you're free not to look at it!
But... no. There is a certain joy many people find in being offended. Righteous anger is often an enjoyable emotion, particularly for miserable people, particularly when experienced as part of a group that shares your rage.
Your lives on earth are hell?
Well, wave your knives and yell!