I suppose Trump may not be intentional in the damage he is doing to America. His lack of sense may account for it. He boasts about how smart he is, though it is clear his narcissism nullifies any native intelligence he may have. He in fact speaks stupidly.
Great Britain, quite aside from our historical connections, is by far our most important ally. When Prime Minister David Cameron says Trump’s remarks about banning Muslim immigration are “divisive, stupid, and wrong,” Trump shrugs his shoulders and says he doesn’t care. that shows, first, an inability to learn from his superiors, second, an inability to grasp how important is our alliance with Great Britain, and third, a dangerous tendency to lead us back into the isolationism which caused so very many thousands of deaths by our delayed response to Hitler and Nazi Germany.
Remember the rules: Smart people don’t have to remind us how smart they are and trustworthy people never have to say, “Trust me.”