Israel
The reason [President Trump] wanted to [declare Jerusalem the capital of Israel] in the first place was symbolism in fulfillment of a campaign pledge to his evangelical base.
[Moving the embassy to Jerusalem shows] mainly a profound lack of understanding of the region [and is] motivated primarily if not exclusively by domestic politics... [It] feeds the narrative that United States and Israel are waging a war against Islam.
Trump's tone is at least as important as his substance. But it may be neither will matter v[ery] much, because the framing of his statement in the region has largely already happened.