“Rav Avigdor Miller – His Life And His Revolution” by Rabbi Yaakov Y. Hamburger p. 119:
The Alter taught that not only does bias affect our judgment, but entire ideologies may be nothing more than the manifestation of self-interest. He once exclaimed, “In all likelihood, the movement for protection of animals, with the resultant prohibitions of slaughter, came from someone who owns a dairy restaurant!”
To be clear, I posit conspiracy theories are positive.