There is no such thing in English as a "charged event." The phrase has to be "highly charged event" to make sense. A "highly charged event" is a precarious or difficult situation.
a "highly charged event" refers mainly to emotional tension. This is saying that these name changes can be really emotionally and/or socially uncomfortable for everyone, and can easily result in arguments or other problems because everyone has strong, and often opposing, opinions.
I think this idiom comes from the concept of a high electrical charge (positive vs negative) causing an eleme