I would tell the dictators THEY are the ones in need of psychiatric care for making ridiculous assertions.
“No! I’m not taking my son anywhere except out of your jurisdiction!
“You have no logical or legal basis for your demands!”
“Your behavior is worse than Mao’s re-education camps!”
“No! I’m not taking my son anywhere except out of your jurisdiction!”
You wait to tell them that until *after* he’s left the area, and preferably after the *rest* of your family is gone, too.