Greetings,
I read your review online and was compelled to respond to your question at the end;
"Whatever happened to the idea that the centerpiece of every major religion is love?"
Perhaps, for an answer, you should read the teachings of the Christ.
Last time I checked, Mel Gibson is not the centerpiece of Christianity and is not the person attributed with coining the phrase, "That which you do unto the least of my brothers, you do unto me."
Greater love hath no man than to lay down his life for his friend.