We don't speak for the world.
No we don't.
Neither does the world speak for Israel.
Israel is a sovereign nation. It is none of the UN, the pope or the muslum's business where they chose to have their capital. Their seat of government is and always has been Jerusalem.
Trump merely recognized it as such. Something which has been US law since Congress passed it in 1995. It is also none of the rest of the worlds business who or what we chose to recognize.