Exactly, Christ’s sacrifice fulfilled the old Jewish covenant, but many Jews view Christianity as an “earthly threat” and don’t understand the spiritual/covenantal aspect, most having lost their faith long ago, anyhow.
Certainly Judaism is a religion, but after the Christ’s resurrection and the destruction of the temple in 70AD, God had clearly closed the book on the old covenant, but not all Jews were paying attention.
Islam is a Judeo-Christian heresy, plain and simple and should’ve been left on the trash-heap of history along with so many other heresies.
Why do you hyphenate “Christian”?