[zaphar]

Not to endorse project 2025 or Vance, however, Your example is not an endorsement. It's an association which does not in any way imply endorsement.

[mmooss]

I think it does imply some support and agreement.

[zaphar]

I associate and even am friends with all kinds of people I don't agree with. Implying that I endorse their views just because I associate with them would be to assign motivations to me that I don't have.

[mmooss]

That's not what happened.

Writing an introduction to someone's book, as a public figure, is lending your reputation to them - that's the point, to put your name and reputation behind them, and so they can show that off for credibility.