Whether that alone is something to be banned over is probably context dependent, and I don’t have any faith that that instance had a good reason for it. Nevertheless that person holding up their great take about the nuclear bombs being good actually does not paint a great picture of them as a person. It makes them look like a reactionary US nationalist who wants to believe anything that makes their side the “good guys”. They can pretend it was morally neutral all they want, but morality is the only reason anybody argues something like that because it’s so nebulous the only way you get there is with motivated reasoning.
At any rate I wouldn’t put that on the pile of reasons to hate on the .ml instances, not when there are so many good reasons.