Donald Trump accidentally just revealed how little respect the world has for him, according to a former George W. Bush adviser.

Former speechwriter to President George W. Bush, David Frum, on Sunday flagged a comment from Trump in which the president threatened military action against Nigeria based on claims that have been rejected by the allied nation. For the conservative writer, the response to Trump's comment set of alarm bells.

"Yesterday afternoon, Trump threatened to launch a military attack on the most populous country in sub-Saharan Africa," he wrote. "The fact that few express much upset at this bluster is a marker of how little respect this blowhard president commands at home or abroad."

He went on to elaborate, "If any previous president issued a personal statement, 'I'm considering massive military strikes in sub-Saharan Africa,' there would be tumult - even panic."

"But with Trump, everybody shrugs, including his own supporters. 'That's Trump. He says things. He's full of s---. Next?'" he concluded this weekend.