Oh how fashionably cynical.
Honestly. One author being recognizably a Democrat is not the same thing as tolerance never "actually being practiced for real in this world."
I happen to believe that many things are tolerated by many people, on something of a daily basis.
It's not "fashionable," it's true of many people, especially of those who go to either
political extreme. I could name examples of how this hypocrisy plays out under many different guises and ideologies, but I see no need to belabor the point.
Are there some out there who practice real tolerance? Yeah, but you won't find them in any hardline ideological camp. And they usually aren't the ones making the big noise to the whole world about how tolerant they are. They just DO it.