It is the will of God that man and woman join together eternally as a married couple.
Matthew 19:3-6
3 The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause?
4 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female,
5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
1 Corinthians 11:11
11
Nevertheless neither is the man without the woman, neither the woman without the man, in the Lord.
Doctrine and Covenants 132:15-22
15 Therefore, if a man marry him a wife in the world, and he marry her not by me nor by my word, and he covenant with her so long as he is in the world and she with him, their covenant and marriage are not of force when they are dead, and when they are out of the world; therefore, they are not bound by any law when they are out of the world.
16 Therefore, when they are out of the world they neither marry nor are given in marriage; but are appointed angels in heaven, which angels are ministering servants, to minister for those who are worthy of a far more, and an exceeding, and an eternal weight of glory.
17 For these angels did not abide my law; therefore, they cannot be enlarged, but remain separately and singly, without exaltation, in their saved condition, to all eternity; and from henceforth are not gods, but are angels of God forever and ever.
18 And again, verily I say unto you, if a man marry a wife, and make a covenant with her for time and for all eternity, if that covenant is not by me or by my word, which is my law, and is not sealed by the Holy Spirit of promise, through him whom I have anointed and appointed unto this power, then it is not valid neither of force when they are out of the world, because they are not joined by me, saith the Lord, neither by my word; when they are out of the world it cannot be received there, because the angels and the gods are appointed there, by whom they cannot pass; they cannot, therefore, inherit my glory; for my house is a house of order, saith the Lord God.
19 And again, verily I say unto you, if a man marry a wife by my word, which is my law, and by the new and everlasting covenant, and it is sealed unto them by the Holy Spirit of promise, by him who is anointed, unto whom I have appointed this power and the keys of this priesthood; and it shall be said unto them—Ye shall come forth in the first resurrection; and if it be after the first resurrection, in the next resurrection; and shall inherit thrones, kingdoms, principalities, and powers, dominions, all heights and depths—then shall it be written in the Lamb’s Book of Life, that he shall commit no murder whereby to shed innocent blood, and if ye abide in my covenant, and commit no murder whereby to shed innocent blood, it shall be done unto them in all things whatsoever my servant hath put upon them, in time, and through all eternity; and shall be of full force when they are out of the world; and they shall pass by the angels, and the gods, which are set there, to their exaltation and glory in all things, as hath been sealed upon their heads, which glory shall be a fulness and a continuation of the seeds forever and ever.
20 Then shall they be gods, because they have no end; therefore shall they be from everlasting to everlasting, because they continue; then shall they be above all, because all things are subject unto them. Then shall they be gods, because they have all power, and the angels are subject unto them.
21 Verily, verily, I say unto you, except ye abide my law ye cannot attain to this glory.
22 For strait is the gate, and narrow the way that leadeth unto the exaltation and continuation of the lives, and few there be that find it, because ye receive me not in the world neither do ye know me.
The will of God concerning mankind on earth is for them to join together as man and woman eternally. Anything that goes against this eternal plan of God is against his will. For this reason homosexuality, which thwarts the will of God is considered an abomination. God wants his children to marry the opposite sex and to have families and raise them in righteousness. Anything that goes against the will of God is sin. Laws in society that promote the will of God are good. Those that go against the will of God are not good. People who follow the will of God are righteous and those who do not are in need of repentance.
Does this mean that we as Christians should persecute those who chose to go against God? No, we should love and pray for them and hope that they will repent and choose the right. However, if they organize and come against us and seek our utter destruction, then we have an obligation to protect our wives and children from such wickedness. We should always stand for that which is right and true and teach against such behaviors and promote righteousness in our schools and societies. As Christians we should keep the faith by striving to live by every word which proceedeth forth from the mouth of God and continually repent of our short comings. We should love one another and seek to reclaim ourselves and others from sin so we can rejoice together in the resurrection of the just when Christ shall come again upon the earth.