When I was a child growing up in the Southern Baptist Church system, I struggled with the paradox that the Christian God is supposedly the only god that exists, yet in the Old Testament that same god clearly told his followers that they should not worship "those other gods". I recall asking my pastor and other church leaders, even my own parents, about this paradox and I received non-answers, diversions, a lot of "gee, I don't know" or "you're right, that is strange" responses, and was even totally ignored once by a pastor who was visibly disturbed that a small child would dare ask a hard question.
Of course, as I got older and was exposed to the Internet I was able to research the history of religion and break out of the bubble. I learned that the Christianity of today is nothing whatsoever like early Christianity in its infancy just after Christ's death, and a large part of what is taught in traditional Protestant churches is wholly incompatible with his message. If you follow his commandment that we "love one another, that is the fulfillment of the Law", suddenly all of the -isms have no place in a Christian's heart. Racism, sexism, homophobia, elitism, all violate the creed of "love your neighbor". Yet the most racist, sexist, phobic people I've ever met identify as Christians; yet another paradox to ponder.