Chris, tomorrow morning I would contact the Mississippi Department of Agriculture and get them involved. The state is likely to charge them with a felony offense. I would pursue the case to the fullest extent of the law. Alabama's version of what I said is Alabama Department of Agriculture and Industries. You video proves malicious intent, assuming that your video is admissible as evidence. While this is all fresh on your mind you need to sit down and write down what happened, including time and dates. Every single thing you remember no matter how small you may think it is.
Don't back down and prosecute them.
I guarantee you that you a more level headed person than I am. If I had been in your shoes I would likely be in handcuffs. There would have been a person sized hole in their fence.
The terrorism of the food supply is a big deal. You have the opportunity to set a precedence for beekeeping all over the nation.