My husband basically says the same thing that you do. Britain carved the countries up wrong.
The 3 major people groups are Kurds, Sunnis, and Shias. The Assyrian Christians are a 3rd, but their numbers are so small that any homeland they might dream of will be a “better city whose builder and maker is God.”
The Brits did a terrible job after WWI. The Kurds will not back down. They’ve been persecuted too long not to seize this opportunity.