Part of engaging online is dealing with jerks. It’s part of the deal. Back in the old days when people got up on soap boxes to vent there were jerks then too. No doubt many a slur was hurled in many a public square back in the day along with many a fist.
In most respects we are probably a much more courteous nation today, even with the relative anonymity and ease of communication via the Internet. But the sensitivity level of some has just gone off the charts in recent years.