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There is nothing that precludes a security officer from being less than polite. However, threats of harm could become criminal if they are clearly articulated and put a person in reasonable apprehension of physical harm. That would be a terroristic threat. Of course, proving what was said is not usually a simple matter. That is particularly true since fact finders tend to give far too much weight to a person wearing a uniform and/or acting in an official capacity such as law enforcement and even a security guard.
It would seem that if the security guard was calling 911 for assistance, you could be charged for interfering with a 911 call. Other possible charges include assault, and, perhaps most likely, disorderly conduct.
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