I am glad to post all of the relevant parts(why are you so coy about quoting the Bible?)
3 Some Pharisees came to him to test him. They asked, “Is it lawful for a man to divorce his wife for any and every reason?”
4 “Haven’t you read,” he replied, “that at the beginning the Creator ‘made them male and female,’a]">[a] 5 and said, ‘For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh’b]">[b]? 6 So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.”
7 “Why then,” they asked, “did Moses command that a man give his wife a certificate of divorce and send her away?”
8 Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning. 9 I tell you that anyone who divorces his wife, except for sexual immorality, and marries another woman commits adultery.”
10 The disciples said to him, “If this is the situation between a husband and wife, it is better not to marry.”
11 Jesus replied, “Not everyone can accept this word, but only those to whom it has been given. 12 For there are eunuchs who were born that way, and there are eunuchs who have been made eunuchs by others—and there are those who choose to live like eunuchs for the sake of the kingdom of heaven. The one who can accept this should accept it.”
So here Jesus says two relevant things:
- That marriage is between and man and a woman and
- That any man who divorces his wife and remarries unless she is cheating on him- is guilty of adultery.
I don't disagree with the Christians who say the Bible says marriage is between a man and woman. But other than the Catholics and a few Protestant sects- none forbid divorce.
More to the point- nowhere does the Bible say that Christians should not sell to either homosexuals- or adulterers like Donald Trump.
Instead- the Bible says specifically that Christians must obey the law.
And the law says that gay couples- and adulterers like Donald Trump can be legally married- and the law in that town says that is a violation of the law to discriminate against Christians or Jews or Muslims or blacks or Mexicans or gay couples that want to get married.
Why do Christians want to ignore the teachings of the New Testament- so that they can refuse to do something the Bible never tells them that they should refuse to do?
And why do those same Christians have no problem providing their services to men marrying their second or third or fourth wives?