... and to demonstrate the impossibility of that which you propose, we return yet again to God's command of Abraham, that he sacrifice his only begotten son. Your logic would have God committing an abomination against Himself, and would render Isaac guilty of chilul Hashem.
For this reason your argument is untenable.
Impossibility? Why would you say that? Jesus was a Jewish man...subject to public awareness of his observance by his followers and already he had been accused of blasphemy in public, he ripped on the gentile woman and said“It is not good to take the children’s bread and throw it to the dogs.”, calling her and her people dogs! a Chilul Hashem and I could list others. For Jesus to give the apperance that G-d somehow approved his would-be-sacrifice for the sins of the world is also chilul Hashem. As for the Akeda...take that up with G-d.
I ran it by a Rabbi and this was the reply:
It is absolutely a chilul Hashem- desecration of G-d's name- to say anything about Xtianity as being a kiddush Hashem- sanctification of G-d's name. Yesh"u was tried for treason, NOT for an act that was a kiddush Hashem, and then his death became theologically treated as a human sacrifice. A sin offering, atoning for the people. That does sound like G-d approving of a human sacrifice, which we know not to be true.
Your argument is the one in trouble and untenable.