On the contrary, you need an echo chamber in order to push this idea. Most people are tired of being lectured on what's offensive/not inclusive and constantly walking on eggshells, and it's beginning to show. The Buzzfeed era is over.
The first time I heard this from the political right was about “political correctness” when I was in grade school nearly 40 years ago.
I don't see any evidence that it is any more true now than it was then.
"Fellow space travelers" is similarly exclusionary. Did you consider at all that the vast majority of people who have ever been to space have been rich white men? Not to mention the extremely problematic imperialistic undertones of the entire American space program. Anyone who isn't from a privileged background is again ostracized by your words.
Could you just read this again and think about it a little? Amazing zinger there.
Conservatives have been saying this forever, and its not coming true. They said it about gay slurs and racism and have been saying it forever about sexism. They're born to lose and can't stop complaining about how Being Appropriate at Work is so hard These Days.