Christians shouldn't reject, exclude anyone:

The separation of church and state wisely dictates that civil marriage equality be decided solely on the rule of law, on the full inclusion, civil rights and equal protection for all citizens. Iran is a theocracy. The Taliban is a theocracy. The state of Maine is not a theocracy. But since so much of the opposition to marriage equality is coming from religious conservatives seeking to inflict their particular religious views on the population at large, it is important to understand that there are thousands of people of faith in Maine from all traditions, and hundreds of clergy, who support marriage equality because of, not in spite of, our faith. A fundamentalist reading of scripture has never been any but a minority view in Christendom, and my own Episcopal church in particular has always been based on a firm foundation of scripture, tradition and reason. Our faith is ever evolving and, as with the end of slavery, the full inclusion and eventual ordination of women and the increasing emphasis on the environmental issues of faithful stewardship of the earth, our faith agrees with what Canon Charles Ravens wrote in 1916, “The Holy Spirit of our Lord does not encourage us to believe that nothing should ever be done for the first time.” As a Christian I know that there is nothing in the words or Jesus or in the gospels that leads one to exclusion or rejection of any human being. Jesus was constantly outspoken in the defense of others whom his society had declared to be outcasts. Indeed his closest friends and followers were among them.