Do you really think the very angry Pope did not pull the strings to this action? This was not a period of separation of church and state..the church WAS the state
I do not see why this would even be disputed the terror of Rome against the reformers is documented in the history books as the inquisition
A draft of the Diet of Worms ( a religious trial ) placed the reason for the order to kill him was religious “We want him to be apprehended and punished as a notorious heretic. It also made it a crime for anyone in Germany to give Luther food or shelter. It permitted anyone to kill Luther without legal consequence.
You have been watching too many Dan Brown movies. The very fact that Luther died as a result of his own excesses is proof that there was no "hit" out on him.
Your biases are tainting your interpretation of historical facts. Set your religious prejudices aside and simply look at the facts without an elaborate manipulation of them. History really isn't that complicated.