Things have to be taken in context. I agree that the wearing of mixed fabrics and refraining from shellfish are not about morality, they are about sanctity - God set the Jews out to be His people of promise. The Messiah came through them. It's not that God didn't have dealings with (and laws for) other nations, but the Jews were bound to certain rituals and stipulations that had more to do with symbolism than with morality.
Sin is any transgression against God. All sins are the same in the sense that any of them separate me from God. Any of them. I hope that's what people mean when they say that all sins are equal. Because, of course, if they were all equal in all ways, they would all carry the same penalty. Or the same level of consequence. Under the Old Testament law, some sins carried more weight than others. Some would get you stoned to death and others required a payment to be made.
I believe there is also a difference between willful - premeditated - sin and being "over-taken" in sin. Maybe the difference is in the heart of the person and their willingness to repent.
All sin is equal in that it is equally undoable. Once done, it cannot be undone. That's why we need a clean slate, and Someone advocating on our behalf.
I believe that everything commanded of us - both to do and not to do - is for our benefit. I don't claim to know all the pros and cons of homosexuality. I certainly don't think that homosexuals are somehow in the same mindset as murderers. I don't hate people for their sexual orientation.
I still believe that anything we surrender to God, He uses for our ultimate good. Willingness is the key. I'm not saying that's easy.
I also don't believe it's the orientation itself, but the lifestyle that is sinful. It's the same for those who are unmarried (but sexually active) who are heterosexual.
Since I believe God's word is Truth, it would be unloving of me to say that I think something is fine, when from what I can see it is condemned. I'm not going to persecute someone for disagreeing with me, but I'm not going to lie if asked for my understanding either.
There are many things that would be easier if they weren't in the Bible. I feel sorrowful for those who oppose the truth (as I understand it). It isn't anything to gloat about. I know there are some who feel that that makes me arrogant. That's not my experience or intention. It's not me saying I'm better.
I believe that what is in there is for me to apply to me first. It's not something to bash other people with or impose on others.
Thanks for asking your question the way you did. I hope I haven't offended you - or anyone else for that matter - in my answer.