I recently posted on R. Yakov Emden's attitude to early Christianity. I just came across a relevant discussion, here
"...There was actually another Soloveitchik who also had a great interest in things Christian. I refer to R. Elijah Zvi Soloveitchik. Here is a picture of him.
He was the grandson of R. Hayyim of Volozhin and the uncle of R. Joseph Baer Soloveitchik, the Beit Halevi. He is also the subject of a comprehensive monograph by Dov Hyman, who was a medical doctor trained in London and who lived in Manhattan. For some reason this book was kept fairly secret, with only fifty copies published and never sold in stores. Here is the title page of the book.
This is not the only rabbinic commentary on the book of Matthew. In 1900 R. Samuel Weintraub's commentary on this Gospel was published (Milhemet Shmuel). Yet unlike Soloveitchik's work, Weintraub's commentary is devoted to exposing the Gospel's faults.29 Here are the two title pages of the book.
The book is an interesting polemic, which unlike most polemics is written in the form of a commentary.... "