Given the behavior theists sometimes exhibit, it is hard to contextualize it any other way but to posit strong atheism. This way, one can at least write off the misbehavior of the theists as "mere human behavior."
The thought that God exists, that people who claim to be theists are His representatives, and that the only way ordinary people can ever do right by God, is by subjecting themselves to theists, and this combined with the fact of the atrocities that people have been doing in the name of God -
for many people, this is just too much to stomach, so they rather posit that there is no God and keep a humanistic outlook, as opposed to setting themselves up for a lifetime of abuse in the name of God.