I'm sorry, but I'm having problems understanding this.
Johnson has shown absolutely no understanding of foreign politics (and I'm not just talking about "what is Aleppo?")
Trump has a terribly sad understanding of the foreign politics including ideas that will make more or less every NATO country unsure about whether USA can be trusted or not, make oppression and even genocide possible without any kind of punishment.
Sure some wars in the Middle East have been failures, but just watching isn't the right thing either.