I think Graham's essay conflates two phenomenon when he describes heresy as thought that people equate to a crime. In fairness to him, societies have conflated them also. But if we're talking about modern American society, they are fundamentally different but can smell the same to somebody who doesn't see the distinction.
A heresy is a position that damages trust. When someone publicly espouses a heretical position, they damage other people's trust in them to make good decisions and have good judgment. Now, you can also breach trust via committing a crime, so the overlap is clear. But nobody is going to jail for their heretical opinions. They can have privileges revoked or be passed over for promotion or advancement, but that's how organizing people to do hard things has always worked. Somebody who says women don't belong in space is going to end up as unqualified to be director of NASA as somebody who fundamentally and with great conviction mis-states the tyranny of the rocket equation. Both mark the person as a poor fit for a high-trust job were there opinion on those topics matters.
And people who believe themselves against "canceling" seem to often be in agreement even if they don't realize it of themselves. A talk was famously pulled from a security conference several years back because after the talk, people concluded that the speaker didn't know what they were talking about. The difference in opinion is on what constitutes a breach of trust, not on whether people can respond to such breaches by routing around other people.