The US president has expelled his own country from the rules-based global trade system that America itself created

For the world’s already embattled trading system, it is as though an asteroid has crashed into the planet, devastating everyone and everything that previously existed there. But there is this important difference. If an asteroid struck the Earth, the impact would at least have been caused by ungovernable cosmic forces. The assault on world trade, by contrast, is a completely deliberate act of choice, taken by one man and one nation.

Donald Trump’s decision to impose tariffs on every country in the world is a monstrous and momentous act of folly. Unilateral and unjustified, it was expressed on Wednesday in indefensible language in which Mr Trump described US allies as “cheaters” and “scavengers” who “looted”, “raped” and “pillaged” the US. Many of the calculations on which Mr Trump doled out his punishments are perverse, not least the exclusion of Russia from the condemned list. The tariffs mean prices are certain to rise in sector after sector, in the US and elsewhere, fuelling inflation and perhaps recession. Mr Trump will presumably respond as he did when asked about foreign cars becoming more expensive: “I couldn’t care less.”

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Impunity over Palestinian deaths in Gaza will lead to further cases like this massacre of rescue and healthcare workers

After 18 months of slaughter, it is still possible to be shocked by events in Gaza. More than 50,000 people have been killed, according to Palestinian health authorities. More are starving because Israel has cut off aid. The offensive is intensifying again – with 100 children killed or maimed each day since Israel resumed heavy strikes last month, the UN reports.

Even so, Israel’s killing of 15 Palestinian paramedics and rescue workers is particularly chilling. Though they died on 23 March, it took days for Israel to grant access to the site, the UN said. Another man was last seen in Israeli custody. Two grounds for seeing this not only as tragic but as a war crime stand out. The first is that the UN says the men were shot “one by one”, and a forensic expert said that preliminary evidence “suggests they were executed, not from a distant range”, given the “specific and intentional” locations of bullet wounds. Two witnesses said some of the bodies had their hands or legs tied. Prisoners are protected by the Geneva conventions. The second is that medics also enjoy specific protections.

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