Not content with taking the US to the brink of nuclear conflict with North Korea, Donald Trump is now set to apply his strategy of international vandalism to perhaps the most sensitive geopolitical hotspot in the world. With a speech scheduled for later today that’s expected to recognise Jerusalem as the capital of Israel and reaffirm a pledge to move the US embassy to the city, he is walking into a bone-dry forest with a naked flame.

For the status of Jerusalem is the most intractable issue in what is often described as the world’s most intractable conflict. It is the issue that has foiled multiple efforts at peacemaking over several decades. Both Israelis and Palestinians insist that Jerusalem must be the capital of their states, present and future, and that that status is non-negotiable.

But it’s not just important to them. The Old City of Jerusalem contains the holiest site in Judaism and the third holiest mosque in Islam, to say nothing of its enormous significance to Christians, meaning that even the slightest move there is felt by billions. It is a place where diplomats have learned to tread with extreme care. There is a reason why no US administration, no matter how pro-Israel, has changed its policy toward the city in the nearly 70 years since Israel’s founding.