Im not sure if you are familiar with the church's practice on copying symbols of other religions or sects as a way of swaying people to Christianity. This has been an old tradition.
Sooner or later they will copy satanic symbols so atheism will be better if they do it.
I've been a member of several churches and not once have I seen an illuminati symbol. But keep notice that I live in Canada.
I live in Poland. Maybe you are lucky.