> being a Christian or Jew in Saudi Arabia today ...
That would suck. However, imagine being an animist or some other pagan in Saudi Arabia today. Oh, wait, you don't have to imagine; you can just look and see what the Islamists do to pagans in Chad and Sudan. Christians and Jews have it infinitely better in Muslim lands than pagans do, just as Jews - as maltreated and hated as they were - had it easier in medieval Europe than the local pagans did.
Monotheisms *really* don't like competition.
The Islamists have a long list of who they want to see dead. I think they just go after which ever group they can easily get their hands on like what's going on in the Sudan. The Nazis had a long list of people who were going to be "evacuated". Unfortunately for the Jews they were number one on the Nazi hit list and a large number were living right where Hitler wanted his lebensraum.
I don't know how animists would have it worse than having their places of worship burned down, holy objects destroyed, and their members killed.
Worse than that, eh?
You stated:
"Monotheisms *really* don't like competition."
I don't know where you live, but in the US Jews, Christians, Hindus and any other people of faith seem to get along tolerably well.
Maybe hundreds of years ago there were worse difficulties, but the only people who are really causing a ruckus currently are atheists and Muslims.