I agree with @laureth, but will ad that preventing pointing at people is usually taught to children by mothers who don’t want people to think they are looking at them strangely. Mother doesn’t want to answer any questions from strangers “What are you lookin’ at lady”? just because her child was curious. And children are often curious about handicapped people in wheelchairs, with limps, dressed oddly. Mom doesn’t want any unnecessary attention brought upon herself just as much as pointing others out brings attention to them.
It was so bad with my mother that I couldn’t even point at a cloud or a cool building without getting my hand smacked down.
What @laureth says reminds me of Indians on a hill pointing out which buffalo they want. Or even which lobster I want at the restaurant. But pointing out the path for someone to find their way home shouldn’t be a problem.
The Point is also used by parents who want to scold their children to the degree it leaves an impression of guilt upon them. Makes me wonder what the hidden psychological reasons are behind This Guy pointing at us for the past fifty years. Is he playing God? Is he attempting to cast blame and guilt upon us? Does he want us to feel so shamed that we’ll go along with whatever he wants? The Point wields power over others. The guy in my link could easily be a thug pointing out the dude he was going to attack. “You mine muthafuckah”.