Why should I think that? ["If you find yourself attracted to a man, acknowledge that attraction as an evil temptation to sin."]
Because it's true. If you find a quarter in your pocket, you should acknowledge that quarter as monetary unit equivalent to one fourth of a dollar. Why? Because that's what it is.
Yes, that was what I meant [pornography]. And I have no reason to think of them as sins.
Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.
Note "fornication" there is translated from "πορνεία", which is a generic term for sexual sin of any kind, and is better translated as "sexual immorality".
Now you have a reason. And there are more where that one came from!
And I have no reason to believe eternity is on the line, or that it would be based on sexual attraction. If a god exists, I would think the least of it's worries would be humans, let alone who humans choose to mate with.
This reflects your decision not to become a father yourself. But you can imagine for a moment what it feels like to have a child. You very much do care who that child associates with, even as a friend, but certainly as a mate. There's a good reason why when you want to marry a girl, you ought to first ask her father for permission. God created us in His own image for a particular reason. If you've ever created anything at all, you know that you care about whatever it was you made.
I don't believe in god, so why would I consider the feelings of something I do not believe exists?
Because He still believes in you.
I'll address each of the things you listed, but I want to go on something a little more objective than us tossing things back and forth about how the country is left/right. The closest to useful/objective info I came across was this:
Thank you. I think the "far-" prefix is contentious on both sides of the aisle. Are you familiar with allsides.com? They rate news sources as one of: { far-left, left, center, right, far-right }. I sometimes disagree with their exact assessments, but I recognize that it's difficult to rate the bias of news sources. Especially because when I consider where I'd personally categorize them, I realize that there're not close to enough options. It's radically oversimplified.
When I say "left" (or "center-left"), I approximately mean pro-trade-union, Robin Hood taxation, pro-birth-control, and sexual intercourse out of wedlock. You get the idea. Anything to the left of that I consider far-left. These days, the Left is off-the-chart far-far-far-left in my opinion.
Also it's impossible to compare the US to other countries for a wide variety of reasons, one of them particular to this case being that classical liberal principles played a major role in our founding, which are now considered conservative principles by most measures. That's how we wind up with (for example) liberal gun law being widely supported by the Right.
Because if you were to compare the U.S. to many European countries, they go far more to the left on such issues.
True, but that means nothing. They're dragging us leftward, due to so many leftists who hate America and think we should abandon our traditional values and instead imitate other countries.