Or they disagree with your views so intensely that they want you silenced.
That's what happened with https://spinster.xyz defederation. A group of male administrators of other Fediverse instances took umbrage at the women-centered, feminist discussion there and between them defederated hundreds of servers away from Spinster.
This was on top of misogynistic attacks and attempts to deplatform. Some unfortunately successful, like the removal of the Spinster app from the Google Play Store and F-Droid.