What does Belgium's capital has to do with this? Do you imply Brussels = European Union?

Brussels = location of EU headquarters, and in common lingo Brussels thus means "People running the EU and deciding things on everyone's behalf."

the_biot 3 hours ago | parent | prev [-]

"Brussels" is often used to mean the entire blob of EU and related institutions.

	▲	nozzlegear 3 hours ago \| parent [-]
		Exactly, it's just like people saying Washington to refer to the US government, or Beijing to refer to Chinese government.