Abrahamic religious texts, and a lot of others as well, are offensive. They clearly and directly glorify oppressive and/or genocidal violence in the past. There's a very strong argument that they demand similar violence in the present and future. They definitely demand a whole bunch of evil and oppressive social institutions. They're more offensive than hardcore porn. Any "believers" who claim they don't really mean what they say should get exactly as much consideration as people who claim hardcore porn doesn't really mean the sex.
It's just that F-Droid shouldn't be in the business of caring what's "NSFW".