Jesus went to the cross for sins He didn't commit. Hello! You can carry a grudge just thinking about that, but don't do it. He knew what He was doing. It was His choice, and He did it willingly. It was the will of the Father, and He always did the will of God without complaint. So what is it that we have to complain about?
It's funny how we 'do' Christmas. Christmas is not something that we do, it is something that was done. It celebrates the long awaited arrival of the Messiah, Jesus Christ. We had nothing to do with it, but what we can do is praise God for the coming of the Lord, who washed away the sins of the world by dying on the cross.