But the stuff about the practicalities of alternatve sources of energy wasn't drift.

The original post raised the question whether the need for oil of the USA (and implicitly other countries which are heavily depemndant on it)might in certain circumstances justify aggression in order to steal that oil from other countries.

The point of the stuff about alternative energy and limited oil supplies was that such a course of action would neither be necessary, nor, except in the short term, practical. As the saying goes, it would be worse than a crime, it would be a mistake.