The United States' allies warn Trump that terrorists 'would be the only winners' of war with Iran

• US allies raise their warnings against war with Iran as Trump increases his threats to Iran.
• UK Foreign Secretary Dominic Raab says that terrorists "would be the only winners" of a full-blown conflict.
• France also warns that war would benefit the Islamic State in the region.
• UK Prime Minister Boris Johnson has also warned Trump that targeting Iranian cultural sites would be a war crime.
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The UK and France have warned Trump that launching an all-out war with Iran would hand victory to terrorist groups in the region.

Speaking after the president threatened a "disproportionate" response to any future attack by Iran, the UK Foreign Secretary Dominic Raab warned that a full-scale war would only benefit the Islamic State.

"We are concerned that if we see a full-blown war it would be very damaging and actually the terrorists... would be the only winners," Raab told the BBC on Tuesday.

Watch Dominic Raab: Terrorists would be only winners of Iran war

Raab's comments reiterated those made by French Finance Minister Bruno Le Maire, who said on Monday that "the instability in the Mideast today benefits only one organization: the Islamic State group."

Le Maire added the conflict would "increase the terrorist threat over France and Europe".

US allies have also distanced themselves from Trump's repeated threats to target Iranian cultural sites.

A spokesperson for Boris Johnson indicated on Monday that any attempt to attack such sites would amount to a war crime.

"There are international conventions in place that prevent the destruction of cultural heritage," a representative for Johnson said on Monday, adding, "You can read the international conventions for themselves. It is the 1954 Hague Convention for the protection of cultural property in the event of armed conflict."