Two groups combined efforts to kill Christ.
The Romans and the Pharisees (Jews).
Both have oppressed, tortured, and murdered the body of Christ.
Both have altered, disparaged, and distorted God's Word.
Both have murdered to keep it out of the hands of the people.
Revelations speaks of both groups, though the Reformers were unanimous in their view that the beast was the office of the papacy.
Futurism was concocted as a Jesuit counter-reformation to hide this from people, and has infected Protestant churches ever since.
"Judeo-Christian" was also constructed to hide the fact that Judaism derived from the Pharisees and was not the religion of the OT.
It's not "one or the other." All who deny Christ are enemies of humanity.