That was activate and it was a fist bump that activated it (sorry, child of the 80s here who loved the Super Friends cartoon show).
As for the "white power" symbol...I don't know where this one originated. Honestly, in the pic with the soldiers, it almost looks as though his friend is trying to flash the ASL sign for "asshole", sort of like the rabbit ears kids like to throw on their friends.
That said, I do think that symbol has taken on some white nationalist meaning depending on the context and timing in the last few years. I also understand that it is only deemed as such if given below the waist (so the "Reign Cane" and "ok" signs are still just that).