I've been awake too long, but isn't murdering infidels and blowing up thousands of years of culture so you can seize a land promised to you by an invisible omnipotent being that only important powerful people can talk to kind of like the Crusades?
I could be wrong. I'm an illiterate pagan. I find religious expression hugging trees and doing a number of other activities in the nude.
Tbh, the concept doesn't require a specific religion or even any religion at all to work.
Christians can do that, so can Jews, Muslims, Hindi or any other religion. Or Marxists or Capitalists, Nazis or Brits, Americans or Russians.
In general, large organisations (countries, companies, religions, ...) that want to gain money/power through violence usually pick a random ideology or motive to do so, because it helps to justify the act and thus motivates soldiers/fighters and potential recruits.
But the justification is never the actual reason. The reason is to increase money and power.
You are also not wrong. It's a damn shame when anybody has to be relocated against their will. I wish I had answers, I just wish we would stop throwing larger and larger rocks at each other.