Christians believe in One G-d, as do Jews and Muslims. We believe that He is one in essence.
We believe in the G-d of Abraham, Isaac and Jacob--the Suffering Servant who was spoken of in Isaiah 53 and the one who is coming as Judge. Without the shedding of blood there is no forgiveness for sin and Jesus shed his blood once - for all.
Jesus is Jewish, the disciples were Jewish and most of the Bible was written by Jews. Thank you for bringing the Light of the world - including us Gentiles.
The prophetic passages from Isaiah and the Psalms are so clearly describing Jesus Christ (to my mind at least) that I'm not surprised Sekulow had a hard time denying what his eyes and mind were telling him.