Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.

Per dictionary.com
Exercise – a putting into action, use, operation, or effect:

Per the first amendment, Congress (i.e. the government) cannot impose any law that blocks the free exercise (practice) of religion.
Now it states religion, which can mean any religion. That can mean Christianity, Islam, Judaism, Hindi, so forth and so on.
This means that if someone states per religious reasons that they cannot do something that violates said religion, then the government cannot force them to go against their believes, per the first amendment.
Yet that is what is being done.
The sin called homosexuality is just that a sin. To force a religion that says it is not a sin is a violation of the first amendment.
If someone wishes to live a sinful live that is his or her choice, but to try to force a religion to condone said sin is again a violation of the first amendment.
Those that truly follow Christianity do not turn their backs on the people living in sin, but we should not be force to say that something we consider bad for the person to be good.
We do not hate the person committing the sin. We condemn the sin itself. We ask that you do not continue to live in this sin, for we only wish what is best for you. There is really going to be an eternal life. ALL are promised to have immortal bodies, but not all are promised to live in happiness. Those that follow the teaching of Christ and the Bible believe in the White Throne Judgment. This happens after the thousand-year reign of Christ upon earth. This is post rapture and post Armageddon. At this time those that lived righteous lives without knowing of the existence of God or the salvation promised by Christ upon the cross, will find that their mere actions will most likely gain them access to God and His Son.
It is those that know of God and His Son that deny Them both, or live in sin will at this time find it the hardest to get past God’s judgment. Of these most will fail and it will be by their own doing. On Mount Sinai God did not just hand down stone tablets with ten rules. He gave a huge list of laws and rules to follow.
One of these is that men shall not lie with other men as if they lie with women. The same is said of women. These are laws given by God. These are sins. To force those that believe this to accept your life choice is wrong. If you wish to live in this sin, go right ahead it is not my job or place to stop you if you do not wish to listen. It is also not your job or place to stop us from believing it to be true.
Do not think that by forcing your way into our Churches you are getting God to condone or approve of your choice. This is the furthest thing from the truth, but as I said, I am not here to force you to stop living in this sin unless you are willing to acknowledge what is written in the Bible. I am here to shine the light of God upon you and tell you that what you are doing is wrong and can lead you to standing before the Great White Throne. This is not where I wish to see. I would rather you be in the court audience. Watching as all the actions of someone’s life pass before all to see and witness.
One time someone said to me. If no one would know, would you commit a homosexual act for $5,000,000 dollars? I said no. He could not believe me and kept pressing me. I said God would know. Not only will God know but also EVERYONE will know. I am in no way perfect, but I will not give in to sin even for money. For your soul is more important to me then money ever could be and the glories of an eternal life that will allow us to explore all the creation of God is more rewarding then paper made by man. Give me what God creates, for He created the entire universe.