We should be careful about judging parties belonging to the past by present-day standards; whereas, judging them by the standard of their day is reasonable, as is judging them by the timeless standard of God's word. For the most part, what follows has upward-looking or superior regard (as opposed to peer regard or regard for subordinates) in mind.
We should show respect for honorable persons of the past, again holding them to their standard and to universal norms (if we correctly ascertain them). But this is a far cry from uncritically praising previous generations, or "fearing to speak ill of the dead." Some execrable persons should be deplored, now so long (perhaps) after their unlamented passing. Nor should we tribally venerate our fathers for nothing but our connection to them. If we know of a wickedness they steeped in, even if it was in ignorance, we should not hesitate to distance ourselves, careful to thank God that "but for his grace also go I."
We have all been rescued from some form of past-connection, be it Adam and the curse that fell on our first-father; or from some other line of gospel-banishment which left some forbear of ours in thrall to idols, superstition, and folly. Even Abraham was delivered from such things,
Jos.24:2! Had he not been, he would not be our faith-father (but perhaps another); and what he was we should have rejected. We honor him for his faith, and for God's peculiar use of him in redemptive history where practically all our knowledge of him is found. We should not respect his lies or his stumbling (also recorded for us) which show him fallible; some falsely and with misguided respect exonerate Abraham from any sin, and make his every remembered word and act respectable. Repudiation of the past necessarily involves some degree of disrespect, a fact we should admit yet find a limit for taking to any end.
Who are we to judge Abraham, who is such a father to us? Well, are we the ones judging; or are we receiving the judgment of God--one that commends Abraham to us, while not covering him with rose-tint at all angles? If we know less of any man than we know of a Bible character, even a biological ancestor, we should pay the minimal respect we would an older if unfamiliar living relative. No man is due unqualified honors. We owe honor to man as the divine image-bearer, as parent or surrogate, and as office-bearer. All these are in relation of man to God. We are to give EVERY due honor "in the Lord," or "as unto the Lord." And if in any case a man demand divine honor that supersedes his authorization, or demands approval for his ungodliness, we must
respectfully refuse it, unless or until we have been duly appointed to dispense divine disrespect for one that deserves it.