One of the principals which this country was founded upon was to protect the rights of the minority. So everything cannot be settled at the ballot box. If everything was settled by a vote this country would look very different in terms of who could do what.
Of course. Our constitution defines the process and limits which we must oporate in.
While I know that some interpret the Bible that homosexuality is a sin,...
Pretty much everyone that I know of. The language is pretty clear in both the Old Testament and the New Testament.
are there any prohibitions against working with or hiring homosexuals? Or are there other prohibitions against interacting with homosexuals? I really am curious. The reason I ask is that most people engage in some behavior that others would consider sinful in one way or another yet they willingly interact with these sinners.
Well Jesus spent a lot of time with sinners. We are to encourage each other not to sin. We shouldn't tempt or cause others to sin and we should be careful of temptation ourselves.
We could find much more but for a start see the following references...
Galations 6 Says "Brethren, if a man is overtaken in any trespass, you who are spritual restore such a one in a spirit of gentleness considering yourself lest you also be tempted." 2, "Bear one anothers burdens and so fulfil the law of Christ."
Romans 14:4 "Who are you to judge another's servant? To his own master he stands or falls. Indeed he will be made to stand for God is able to make him stand." 14:13 "Therefore let us not judge one another anymore, but rather resolve this, not to put a stumbling block or a cause to fall in our brothers way."
Matthew 18:11"For the Son of Man has come to save that which was lost. 12, What do you think? If a man has a hundred sheep and one of them goes astray, does he not leave the ninety-nine and go to the mountains to seek the one that is straying? 13, And should he find it, assuredly, I say to you, he rejoices more over that sheep than over the ninety-nine that did not go astray."