Now, is what you say true? about the other deities? That is quite disrespectful. The gopis worshiped Durga to make Lord Krishna their husband, and he did not object to this. Although, in Vaishnavism, deva worship is only performed for material desires; wishing to attain moksha will not do, as devas cannot give moksha. As for atheists, i do understand what they are doing, as they are not the Lord's devotees. They don't understand. Let them be. Finally, how are they ritualistic? Isn't it clear to them that Bhakti, or love of God is more important than rituals?