I recently read a letter in which the author promotes same-sex marriage using God's commandment to love all. The writer also says it is the Christian thing to do.
Well, I am sorry to say you must not have read the same Bible I did. To say that God has no problem with same-sex marriage, homosexuality, etc. is to make a liar out of God. This is really not too wise.
It is true that we as Christians are to love all but that does not mean we are to accept all. We as Christians are not to judge, but we are to tell you what the Bible says. It's not me or anyone else that tells you same-sex marriage is wrong, it's God. As I've said before, take it up with him, not me. You probably won't like his answer.