"To say that the God of Christianity saves people is like saying the Grinch saved Christmas. No he didn't. He just stopped ruining it. He is the one who botched the whole up in the first place! But the Christian God is far worse than the Grinch. Imagine if the Grinch had come back down to Who-ville and said, 'I will give you back your presents, BUT only if you will promise to worship and obey me forever.' Who (pun intended) in their right mind would call him a gracious savior? No one. They would call him an egomaniacal lunatic. And that is what the God of Christianity is like."
So, what is the problem with this analogy? First of all, it mixes up the character roles. When the Grinch returns the Christmas presents to the Whos, he is the one who stole them. The Whos are the offended party. The really amazing virtue in Dr. Seuss' story, that often (if not always) gets overlooked, is the willingness of the Whos to forgive the Grinch and welcome him in (or back in, depending on which version you are watching/reading) to their family/celebration. The criticism has it exactly backwards. God is not analogous to the Grinch, but to the people. He is the offended party. We are actually the ones who have been like the Grinch, harboring animosity towards him, and living for ourselves. We are the ones who have turned against him, and need to come back. It truly is only by truly amazing grace that he would forgive us and welcome us back into the family/celebration.
Secondly, it distorts the narrative. I agree that it would be cruel of the Grinch to steal the Who's presents and then use them as leverage for blackmail. But that simply isn't the Christian narrative. Jesus doesn't come like a mafia boss (another common analogy), into a room filled with happy, innocent people and threaten them at gun point, "Follow me or I will decorate the wall with your brains!" Rather, he comes like a doctor offering a cure to a room full of terminally ill patients. You may disagree with that "diagnosis," but you cannot disagree that it is the historical Christian view of anthropology. What is more, in order to do so, he suffers the consequences of that disease in our place, offering us his own perfect health in exchange. At this point, I can imagine that someone might say, "Yeah, but he is still the one threatening to send people Hell!" I am not going to try to get around that or sugarcoat it. It is not biblically accurate to say "God doesn't send anyone to Hell, people just send themselves." To be sure, that is part of the equation, but it doesn't do justice to God's holiness and his role as perfectly just judge. Even so, the Christian view is not that God arbitrarily sends otherwise morally neutral people to Hell for failing to choose A rather than B or that he threatens people in order to get what he wants. Rather, God, who is perfectly holy and just, must punish evil, (no less than we would expect of a good human judge) and we are all guilty.
For these reasons (minimally), Dr. Seuss' "How the Grinch Stole Christmas" story is not a good analogy for God and humanity.