A hallmark of free speech is the ability to offend. As a matter of fact, it was specifically called upon to protect political speech that stopped short of slander and defamation, but left every person that heard it offended.
Now, I don't like to use the term 'offended' because like 'racist' it is overused to the point of meaninglessness. Yet, if speech DOESN'T offend you at some point you are living in a bubble you truly need to get out of more often.
Getting out of your comfort zone is a sign you are stretching - if you only get out of the comfort zone by someone's speech, then YOU have failed in a basic human endeavor: growth.
All of this doesn't mean that you should burn your ears with loud, obnoxious, vulgar, hateful (not speaking of some pathetic "hate speech" code), diarrhea of the mouth. My brother could string together grammatically correct swear words, which were more humorous than what he was aiming for... No, calling someone corrupt, or a liar in order to protect the sensitive ears is treating people like four year olds. While they might WANT to be treated like four year olds, we really have to raise the next generation of twenty somethings to take on the real world.
So, next time someone 'offends you' with something they say, take a second to really listen and see if the problem is not what you are hearing, but what you are thinking.