Protesting bees!

We want our freedom!
Stay out of our hive!
Bring back our honey!
Everyone else seems to be protesting so why not these guys?

Keeping bees is, for me, the most frustrating and rewarding hobby I have ever had just when you think you have got the hang of it and understand what they are up to they do something like this!
I don't know why they are doing it?
It's not robbing as there is no fighting.
They cannot be overheating as the temperature is comfortable.
Maybe its the Varoa treatment I installed yesterday but then I did it to both hives and the other hive is fine.
So what's going on? Answers on a postcard to-