The divine names used in imprecations distinguish themselves from human names by their sonority.
For instance, the Latin ‘Domine’ keeps in its phonic aspect a way of addressing names with an openness that overlaps the sheer efficiency of calling someone.
By praying to God, it seems that we do not look after a sort of soul salvation, but rather we search for a necessary salvation of the words from the limited communicational contexts.
Again, they are primarily limited because of their phonetic simplicity. Any extension of the vocals of someone’s name tells nothing about the extension of that person, but only about her extension in us. If we call her in the manner of an imprecation, there would be a case of malfunctioning of communication and not one of passing beyond it.
Only what we deem to be divine supports the extension of our calling.
We cannot decide anything as regards the question about the existence of God while we call him through imprecations, nor while we hear them. To affirm or deny the existence of God pertains to a communicational language, one with short and limited sounds.