He could be moving with the blow to rob most of it with hit’s power. Punching Superman while he’s staying stock still would be like punching a brick wall with all your might.
You’d likely shatter your hand and tear open your knuckles, at the very least.
This is just Superman getting the point across without destroying the guy’s hands.
this was in North Carolina in response to Samuel Oliver-Bruno being baited by ICE into leaving his sanctuary church. Samuel was taken from Raleigh to George to Texas and has now been confirmed as deported. His wife is medically ill and his son still lives in NC. Here is a link to how to support Samuel and his family: https://www.sanctuaryatcitywell.org/help