John Bolton is itching for a war against Iran, Venezuela, and other places. He has a long history of being horribly wrong on international issues, opposing diplomacy, and lusting after more wars.
Bolton is so extreme that later in May and early June 2019 Trump felt the need to tone down his own hawkish rhetoric and threats.
This article from May 2019 says John Bolton is “itching for a war.” He threatened Iran with “unrelenting force” as U.S. bombers were being deployed to the Middle East. He wants to provoke any excuse to start a war.
See this article: