The moral could be that one should face death with acceptance. In the story, the old man's encounter with death shows that it is an inescapable part of life.
In this story, the 'old man death' might be a personification of the end of life. Storms are often associated with power, danger, and change. The combination of the old man and the storms could imply that death comes with a kind of force that is as powerful as a storm. It could be a story that aims to make people think about how fragile life is and how death can sweep in like a storm, disrupting everything. It might also be exploring the idea that just as we can't always control storms, we can't always control when death will come.
There's a possibility that it's one of his old enemies who has finally found a way to defeat him. Maybe they've discovered a weakness in Logan's healing factor or have a new weapon that can kill him. For example, if it's a foe who has studied him for a long time and found a way to disrupt his mutant abilities.
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'.