Feeling that there are more "heresies" now than, say, 25 years ago says a lot more about the orthodoxy of ones' opinion than it says about the state of the world.
I don't think you need to put "heresies" in vague quotes. He's defined it quite clearly as factually correct statements which will destroy your career and social life if stated.
I have little confidence that the author and I wholly agree on the set of "factually correct statements".