No two Gods are identical in the minds of the faithful.
Regardless of how strict the doctrine or dogma, every person adapts their variety of God to fit their setting, Two people can say they believe in the same God, but one might think he has the power to heal, while the other doesn’t. One might feel he condones polygamy, while the other doesn’t. Suddenly, that same God has become nuanced.
It’s difficult, at best, to confess there’s only one true religion and billions of different Gods.