This may be true. It wouldn't surprise me if Parler said "no" when asked to take them down, but I didn't see that even in Amazon's court filing.

However, I don't think Amazon should interfere in customers' businesses and harm the relationship between customers and third parties (the users). What if Amazon had said, "Netflix, we find the Cuties movie offensive. We have shut you off and will delete all of your data within 24 hours."