Not true..... you have to go back to when Morgan confronted Richard in his room..... Richard talked about deceiving the saviors to a point where they though the kingdom understood the impacts.... and only after that could they strike. Im sure the killing of Richard and what Morgan said to the guy after it happened was all part of that plan.
Or I am just reading into it too much.... but that was my take of why/how it went down
This is exactly what I was thinking