SE - I'm curious. How can something be absolute if it changes with the seasons? That article is saying that poeples' ethical codes change, and (even according to Jeffe's definition) that means morals change. The group, as a whole, sees things as right and wrong differently during different times. Therefor, they can't be black and white, simply because if they were they would not change. It's just like if one fashion was right, it would stay in style forever.
Example - it used to be thought rightous to torture a criminal until death.
The 'fact' that morals are dictated by a group seems only partially correct to me. Yes, morals are taught to most people by other people, who learned it from somebody else. Yes, people generally mold their moral system to the rest of the people around them, so their morals are similar or even identical. No, you don't have to do that. My morals, which are what defines my ethical code, do not have to be your morals, or the group's morals, or anybody's morals but my own.
So, no, morals don't have to be a group project. Your own experiences, religions, surroundings and thought processes. And, back to the actual point of this whole discussion, as long as you can rationally justify your morals, nobody should have the right to tell you that you are wrong. Same idea as religion or any other matter of belief.