If you can't make it through life without getting "triggered", it's you who has the problem not the world. So snowflakes should seek mental help, not force their craziness on others.
Of course, I don't believe they are really "triggered" or "offended" it's about reducing the Overton Window. Like you say in your second paragraph, it used to be the high and mighty that controlled public discourse, but among ourselves we could joke around and talk freely. Now no matter what you say or write, even if it's in no way malicious, some fucker pops up looking to take offence.
https://en.wikipedia.org/wiki/Overton_window