That’s totally valid—you can base your usage of a product on your view of the vendor’s values. So why are so many people blasting Duke’s library for doing the same thing…
The vendor’s stated position is that they are apolitical. Duke dropped the vendor because of what a founder posts on his personal website. People are blasting duke because they think it’s a dumb thing to do. Duke is of course free to do what they want.
If you read the article fully, that was only a small part of the reason. Company leadership demonstrated a repeated pattern of poor taste. In short, racist, anti-worker, and discriminatory toward their own employees.