Yet when a rising social media company chooses to deliberately use an open source project as their first party platform, this is when F-Droid decides an exception has to be made? I thought we wanted the world to embrace FOSS, but apparently not.
So let's speculate: perhaps they agree with you that Facebook has abhorrent discourse but also felt that FB had some beneficial content as well so decided to not ban it not to mention it's popularity. Association with Gab clearly provided no such benefits.
I see no reason why we should restrict FOSS adoption to only people within an arbitrary and unrelated political sphere. Everyone wins when everyone is using FOSS, even the people we don't like. Unfortunately F-Droids decision on this matter hurts FOSS adoption from conservatives who will only continue to associate FOSS with the left-wing.
How about if you were the developer of a web browser?
Personally, I find it very annoying that clients block these alt-right instances. It feels like a layering violation.
Just as you have the freedom to not use those apps if you don't like them.
If I was the developer of a chat client app, I certainly wouldn't want to see screenshots with my app branding in them alongside alt-right content and I would do the same to prevent it from being used for such things.