You make a good point about the distinction between evangelicals and fundamentalists. The work of an evangalist involves spreading the word, rather than imposing it on others, and people who call themselves evangelicals when they are lobbying government and running campaigns seem to be misappropriating the word.
Jesus was pretty clear about what kind of acts would ensure the faithful a place in the kingdom of heaven: feed the hungry, give water to the thirsty, welcome the stranger, clothe the naked, nurse the sick, and visit the prisoner.
Apart from that, he always seems to emphasize the importance of the individual's relationship with God, and downplay any kind of involvement in this world. He certainly didn't advocate political activism.
It is therefore curious that many Christians seem to feel that politics is a kind of religious calling.