Why I do not care about party distinctions...
One might believe in a political party, might give life and/or limb for it. But the typical political party is a machine, driven by a desire for power. It may well require humans to populate a party, a party needs individual sweat and labor to make a party work, but do not forget that a party is not there for you, you are there for it.
In the state of Minnesota a Republican is almost certainly a Democrat anywhere else. In the state of Mississippi the reverse is true. The convenience of location and who we are representing is a context which allows people who would otherwise not be different, to choose sides in a morality affair. But in the end, they almost certainly weren't affected by their vote or their support of a side of an argument. In the end people who are otherwise indistinguishable have made a decision, and in the US the result is Majority rules with lip service to minority rights. But it doesn't really play that easily.
But labels don't work anyway. A Conservative Democrat or a Liberal Republican are no longer common. The divisiveness of politics has made the center ground, the commons, an area where those who linger are called traitors.
Who are we as Americans? Do we matter? Have we passed the point of no return and we've fallen from sole super power to one of many great powers? There are a great many people who believe that the United States ought to be concerned only for American issues. But then, if everyone had that as their goal then there'd be no response to evil in many different cases.