In contrast to the common response of retaliating against those who have wronged you, Jesus urged his followers to forgive. In contrast with loving your friends and hating your enemies, he told his disciples to love their enemies. Needless to say, most people, including most people who say they are Christians, do not live that way.
People generally recognize the absurdity of thinking that God is a supporter of their favorite football team or basketball team. We may be passionate about wanting our team to win, but it is hard to think that God takes sides in that way. When we pray before a game, we feel okay about praying for people not to be hurt or for the game to be enjoyable. But praying for our side to win seems over the top. On the other hand, many people find it natural to assume that when it comes to war, God is on the side of their nation.