Kicking someone's rump and seeking help in burning down a business are completely different and far apart.
I would have to take a threat like that very seriously and implement precautions that would protect my livelihood and property.
She should be charged and let all the facts be presented. Not just on what's coming from a media source.
Something else that needs to be considered....her tweet fueled the fires, so to speak, and was probably key to some of the other threats that began to pour in after she hit the twitter-sphere with her hate filled diatribe. They got death threats, they got threats of being robbed, beaten...etc etc
So should she face some criminal charges? I just don't know...I'd lean toward yes, possibly fines and community service.