IMHO, with most political disputes, there is a stated, *official *reason for something - which is often just window-dressing - and underneath that, there is the un-stated, *real *motive or point of friction that causes the rub. And although there may be a hundred points of disagreement in a debate, it often really just boils down to one or two “irreconcilable differences” - the one or two things that the disputing parties cannot compromise or agree on.
For instance, with regards to creationism vs. evolution, I think this is very often not about the science of it - just window dressing - but rather, in fact a proxy “Does God exist?” debate raging underneath the surface, with creationists overwhelmingly on the side of “God exists” and evolutionists overwhelmingly on the side of “He does not exist.” (Notably, it is easier for a Christian to be an evolutionist than it is for an atheist to be a creationist.)
With regards to abortion, the true point of friction seems to be, “Does the mother’s right to do what she wants with her body surpass the fetuses’ life?” I do *not *think this is about “Does life begin at conception?” or “Is a fetus a person?” because many pro-choicers would still support abortion rights even if a fetus is a person. (Thread, for example.) The talk about whether a fetus is alive, viable, a person, etc. is really just window dressing and not the true point at hand.
The gay-wedding-cake baker issue is largely one of “Should the baker obey God or man?” The baker - *assuming *that he/she believes that it would be a violation in the eyes of God to support/endorse a gay wedding by providing his business services for it - which is a long train of assumptions - is essentially saying “I must obey God rather than man.” The gay couple - regardless of their religious beliefs or lack thereof, or other factors - are essentially saying, “Man’s law trump’s God’s.” Of course, there are Christian bakers who would have no qualms about catering to a gay wedding whatsoever and don’t see it as a violation against God, and there are no doubt some bakers who don’t want to serve a gay couple for reasons having nothing to do with religion at all, but by and large this seems to be a “Obey God (or, at least, my beliefs or assumptions about God) or man?”
Gun control - not sure about this one - seems to be a twofold, “Does the Constitution outweigh numerous gun deaths,” and also, “Do guns do more good than harm?”
Taxation - seems to be, “How much is one’s fair share to pay in taxes?”, with much of the disagreement all stemming from just what one considers to be fair or unfair, especially with regards to taxing the rich.
Voter-ID: Multiple points of disagreement, but one seems to be, “Is voter fraud a significant threat, or could it be?” Those who support voter ID would probably strongly align with “yes” and those who oppose it would align with “no.”