I can think of at least one nation with Christianity-imposed freedom restrictions as bad as some Islamic countries
Like I said, all nations have flaws, and there is no such thing as a perfect nation (aside from the Kingdom of God). In the case of this bill, it is not Christian to persecute homoloveuals. While they are correct to declare homoloveuality as a sin, persecuting the sinner for their sin is not the proper response and God alone shall judge them. There are many people throughout the world who claim to fight for Christ when in reality they are fighting for themselves and for their own cruel desires.
However, God has given man the freedom to make the laws of their nations as they wish, and as all nations are on this earth under God's hand, we are to be subject to the governing authorities, because it is honoring to God.
In the United States, it is very good that we live in a democracy rather than a theocracy. Churches that are state-sanctioned become the government's puppets, and are no longer used for God's glory, but for the evil purposes of sinful man. And when governments permit religion to control politics and the country, it just as easily allows in the possibility for other religions to come in and take over.
I'm not sure what you're even trying to argue here.
The US does not have an established religion
Additionally, christianity is, by far, the majority religion, and has a very large influence on politics
The Human heart is literally an idol factory. Every day, we easily make idols out of things- oftentimes without consciously knowing it. There are many people who spend their lives pursuing making money to the point where it becomes their life. They have made money their idol, and rather than trusting God to care for their finances, they take matters into their own hands. Many politicians idolize power, and pursue it all costs, making false promises to win elections, pursuing backdoor methods to keep in office, or even assassinating or killing their political opponents. It can be said that many people in all countries across the globe pursue their own selfish desires, wanting to be the gods of their own lives. Countless people worship the gods of money, loveual pleasure, food, movie stars, and video games.
I'm not sure why you're bringing ethnicity into this
Ah, my mistake. I was unaware that ethnicity and ethnocentrism were two different things. I looked it up in the dictionary, so now I know the difference between the two.
If you think that makes Christianity better, that's your opinion.
A follower of another religion might say this is a downfall of Christianity and something that makes their religion better: That they actually have to be a good person to get rewarded.
You're free to your opinion, and they're free to theirs, but for you to call other religions inferior because of it is highly ethnocentric.
Except there is no such thing as a "good person". In the beginning, Adam and Eve chose to disobey God, and now all mankind is burdened with sin. We are all sinners; unholy and unperfect. It is impossible for us as fallen beings to be "good". We as individuals may do some good things- but we have a sin nature. On the other hand, God is holy; without blemishes or sin. He is literally good.
It is not ethnocentric to say that Christianity is superior. Christianity is not about an idea, or a theory, or a way of life- it's about a person, and that person is Jesus Christ. Christ is for everyone, of every culture, skin color, tongue and region of the world. He is not himself for a specific culture, but for all men and women. The idea of cultural relativism ("what may be true for you in your culture may not be true for me in mine") is one of the many lies created by fallen mankind as an excuse to themselves to disobey God and pursue their own ways.
No other religion possesses the hope that can be found in Christ, because He is the only risen savior. The religions of mankind cannot bring true hope to their followers because there is none to be found- they are created by men, and like the bodies of men turn to dust and crumble. No other religion can answer the truly critical questions of life as logically and coherently as Christianity can, and no other religion can meet the mountains of evidence that Christianity has, and no other religion has such a positive message of love and salvation.
The God of the Bible is real, and He has instilled this knowledge in the hearts of everyone, deep down. Not only that, he places in each one of us the realization that there is life after death. He proves his existence to us in countless ways- through the amazing beauty of His creation, through the very fact that there is something rather than nothing (a question of existence science cannot give a coherent answer for), through the complexity of life, the majesty and power of mountains, gunpowder and supernovas, and most of all, through His word. Everyone is without excuse- in their hearts they shall know He is the one true God, but they do not want to be responsible to Him; so some follow their own gods, or simply say he does not exist- and God has given them this freedom to do so. Christ has died and risen so that everyone may have eternal life that is assured and true, and in Him, we have the one true freedom- the freedom from eternal death.
Everything is this world is temporary; anyone is free to fool themself to believe whatever they like- to worship whomever or whatever they want, and do whatever they want. But when you die, there is no escaping the truth of God. Jesus- He's eternal, and that's who I'm going with!