Our realities are quite different due to what we consume. They are part of who we are. Most people, who are part of the matrix, are imprisoned in their own realities with an evil master in control. The master has so much control that he could make them collaborate together to kill his target without them realizing it.
If you exist in True Reality, the one controlled by our CREATOR, you are warned before they collaborate to harm you. Notwistanding, you are immune from harm. Attempt to violate it usually comes with great consequences.
The CREATOR who controls this reality has ultimate control over all realities. If HE does not allow the evil master who is in charge of other realities, he can do nothing