I don't agree with this. I think that while it's true that in many cases opposing ideological sides optimize for different goals, and that these goals are not

I don't agree with this. I think that while it's true that in many cases opposing ideological sides optimize for different goals, and that these goals are not always clearly and openly stated, it's not true they never understand each other. Sometimes they do understand each other, but reject the other side's goals as immoral, unsound, or mistaken. You cannot simply chalk it up to misunderstanding.