While i don’t disagree on its face. That statement usually means “people should just be on my side”.
As written above; the Overton window has been moving left, and things like not prosecuting female gential mutilation in the US, straight socialism, not settling for anything less than full gun bans, open borders - things that would have got you locked up 50 years ago are being pushed by presidential candidates and congress members.
It’s moved left, and a little too far. So while I agree people with brains should be united, right now many of the balanced beliefs will get you called an alt-right Nazi.