The atheism of Feuerbach and Marx is the only kind I know that seriously confronts that religious and theist thoughts and sentiments are about something. Feuerbach simply claims that they are about human beings- and it’s hard to see what other option there is (the natural world?) The explanation, it seems to me, has immense and even fatal difficulties when it seeks to explain religious art. There is simply no human being, secular historical/ natural event, or human accomplishment that could be reasonably solemnized by Chartres cathedral or Gregorian or Arabic chant (on the link, skip to 3:48); or reasonably praised by Handel’s Messiah; or reasonably sung to in love and devotion by Mozart’s Ave Verum. Note I am not speaking of the words in any of these things. It is the very structure of the building, music or melodic line that would be unreasonable.
If Feuerbach or Marx are right, all this art is absurd or unfitting. Modus tollens.