Jurisdiction harkens back to feudal times in England. The king was very weak, surrounded by hostile barons. Each lord had his own jurisdiction, the king had jurisdiction over a few items, and the church had massive amounts of jurisdiction. The church's jurisdiction was inviolate. Many cases existed of notorious criminals, pillaging, raping, and murdering many and then riding as fast as all get out to surrounding church property. Only the clergy could claim jurisdiction in these matters. There were few central records to determine whether someone was clergy. "REading the clergy" became notorious. To prove clergy, the potential defendant only had to say the first few lines of particular Psalm, give money to the true clergy, and escape punishment completely. The king could do nothing.
Every thug memorized the few lines. This was so scandalous over time that slowly, people agreed to increasing the king's jurisdiction under the fiction that the king's "peace" had been disturbed by the crimes and that, therefore, he had a greater claim than the church. This is how common law developed and a modern nation-state emerged.
Thankyou Barbara for your work on this matter. We all wish Steven the best.