Ben Avraham is a Jew. In that regard, he can offer his opinion of how he views Christianity - spoiler alert, he despises, loathes, dislikes, and hates Christianity - and you will have the opinion of one particular Jew.
If you are seeking, however, to ascertain whether there is some sort of generally shared viewpoint among Jews as to Christianity or some sort of generally held viewpoint of Christianity within Judaism, then whatever Ben Avraham opines is not going to be of much help. His beliefs and understandings are so far outside the boundaries of any movement within Judaism as to be worthless except to the extent one understands and accepts it as one Jew's extremely idiosyncratic views.
Thank you.
Where I come from there are plenty of Christians and its easy to have a discussion with Christians about their faith. Often, but not always they are happy to share their faith, their understandings, and insights. However as a Baha'i, Baha'u'llah teaches to associate with peoples of ALL faiths in a spirit of love and fellowship. As I have no close friends or associates that are Jews, this seems like a perfect opportunity.
It does not bother me in the slightest, the degree of antipathy that Jews hold towards Christianity. I'm happy to talk to Jews who would be considered orthodox and those like Ben who as you say fall far outside the boundaries of any movement within Judaism. For now I see value in talking to Ben because there will be reasons he falls outside the boundaries you refer to and its helpful to understand that.
The questions I have asked Ben, you are welcome to answer too. I'm happy also to discuss and debate different ideas. On the other hand I do not wish to have conversations that are unfriendly or disrespectful.
The starting point for a discussion with Christians about their Faith is a shared belief in the same God, Jesus, and Gospels. With Jews I naturally would have assumed a shared belief in Yahweh, Moses, and the Tanakh. However there seems to be no agreed authorised English translation of the Hebrew Bible. Is that correct?
Your comments about these matters are appreciated. Are you a Rabbi?