Probably so. However, in the analogy you gave, add the idea that UN troops invaded the US to enforce their beliefs. Which would be more important - defending the sovereignty of the US or possibly ending abortion? It becomes a terrible, heartwrenching decision. It's the same decision Lee faced. He chose to defend the sovereignty of his state. History has proven that although he chose the losing side, his motives were honorable and just.
> add the idea that UN troops invaded the US to enforce their beliefs.
After the US attacks UN Fort Sumter. Ummm...
> his motives were honorable and just.
THAT is highly debatable. He fought *against* his nation *for* his state... that's kind of a wash. But he fought FOR slavery. That clinches it.