There's not enough information to accurately say what this'suckling old man public story' is about. It might be a story within a particular community or family that has unique elements like an old man in some situation related to'suckling' which could be symbolic or literal in that story's context.
No. Such stories are inappropriate and violate social ethics and moral norms. Public spaces are meant for positive, respectful and family - friendly communication.
There was an old man who, every day, would clean up a bit of the public bathroom. He'd wipe the sink and pick up any litter on the floor. He told people that he did it because he wanted everyone to have a pleasant experience in the public bathroom. His selfless act made the bathroom a nicer place for all.
Since we don't have much information about this specific 'blackkklansman old man story', it's difficult to say who the old man is. He could be a fictional character created to represent the older generation's experience with the KKK - related events in a story based on 'BlacKkKlansman'.
In 'the old man at the bridge story', the old man is an ordinary person whose life has been upended by war. He seems to be a bit forlorn and lost. He has his own little world back home with his animals, but now that world has been destroyed by the war. He is at the bridge, a sort of liminal space between the past and an uncertain future. He represents the countless individuals who are displaced and left in a state of confusion and despair during times of war.
There's not enough detail to know for sure who the old man is. He could be a variety of things. He might be a war veteran who has some skills or knowledge that comes into play in the story. Or perhaps he's an old family friend of one of the characters, and his presence in the story is to provide a different perspective or a connection to a past event that is related to the events in 'Equalizer 2'.