My principles were principles long before I came along. They are the principles of my Deity, the founders, and my ancestors who go back on this continent to the early 1600s. A relative was a signer of The Declaration of Independence. If you read my answers, you will see I have given these some thought. Departure from those principles is not something be to be taken lightly, especially not those principles laid out by Almighty God, and after careful and lifelong consideration, I have decided not to.
I have little doubt that I share your principles. But there is a difference of opinion how to correctly apply them to the current situation.
Is voting for an immoral / amoral man an immoral act? If it is, how can one vote at all? Does this resonate...? "There is none righteous..." and "All have sinned..."? Therefore,
if I am to vote, I accept that I will be voting for a sinner; a sinner like me.
So the moral choice is whether to vote or not. The matter of who to vote for is a matter of prudential / practical judgment. Since I lack omniscience, I am left to my God given reason to evaluate the more or less likely results of my choice.
If I decide that there is absolutely no difference, that the Republic is lost, and the end is nigh, I may need to consider if I am being tempted to despair. (That has always been an easy one for me to fall into.)
I have decided that rejecting the binary choice endorses, in effect, thw worse outcome of the binary choice (Hillary Clinton). And I cannot get myself off that hook.