If I've said that absolute good/evil require religion, I was wrong. Absolute good/evil require the existance of God.
So really, before you try to tell me what is opinion and what isn't. Why don't you explain why it should be any different for one over the other.
Because for absolute good/evil to exist, someone who has omnipotence must define what is good and what is evil in the first place. If they are absolute, then it really doesn't matter what you or I believe because the labeling of good or evil are not up to us. We may call something good or evil, but that doesn't actually make it good or evil, it only makes it our opinion. What makes it an absolute good or evil is that God has declared it so.
Think of it this way... instead of saying good/evil, let's say legal/illegal. Let's further agree that we live in a country where the government has said that speeding is a crime. You and I can argue all day about whether speeding is a crime or not, but regardless of what we think, a higher authority has already determined that it is in fact a crime. That's the theistic view, with the Government taking the place of God.
Now, OTOH, let's say we're on a dessert island with 500 people on it, there's no government, no commitees, no authority except brute force. Some say it is evil to eat coconuts on Tuesdays, while others say Tuesday is the best day and that it is good to eat them on Tuesdays. Then let's say that the group that thinks it's evil kills 50% of the other group and demands that all live according to the "it's evil to eat coconuts on Tuesday" rule. Given a couple of generations and some time for tradition, just about 100% of the people on the island believe that it is evil to eat coconuts on Tuesday..... but is it REALLY evil or just an opinion that is held by the majority and the strongest of a society? This is more the atheist view of good/evil where an action is good or evil based on what is accepted by the majority of the people. If a hundred years later the same society decided that it was good to eat coconuts on Tuesday, then they would look back on the previous culture and say that THEY were the evil ones!
Joe