Kant certainly was sympathetic with the metaphysical tradition of rational theology that he criticized.

In any matter of moral importance, our first task, before we plunge ahead and decide what to do, is to figure out what we ought to do.

It is a cause of shame to any member of the human race to be a member of the same species some of whose members could vote for any candidate for president that has been offered by the Republican party. Such people seem to be motivated only by short-sighted greed, ignorance, fear and hatred.

What is central to morality is rational self-constraint (acting from duty), in cease where there is no other incentive to do your duty except that the moral law commands it.

I think the term "Kantian constructivism" as an oxymoron. Kant was a constructivist about mathematics, but not about ethics.

My own view is that Kant's conception of the duality of the good (morality and happiness, the good of our person and the good of our state or condition) is a distinctively modern view.

Clearly no working class movement ever came about that was able to do what Marx was hoping for.