Like I already stated, if this is a parable then Jesus wrongfully quoted Abraham. That would make Jesus deceptive and dishonest. I deem the story to be a factual, historical event thereby dignifying Jesus’ words to be truthful, not deceptive or dishonest, hence I am not calling, nor would I ever call Jesus, a liar.
You would never call Jesus a liar but you called someone who loves Him dearly a liar who never would call Him a liar. You sure are an interesting character.
If I would apply your own judgements against you then you would be the liar. Really what this is is a disagreement of parable versus literal. I have all the proof I need and am unlikely to move on this particular point. So agree to disagree.