It is not illegal for a foreign state actor to surveil you. In fact governments sign agreements with other governments for them to surveil you while we surveil

It is not illegal for a foreign state actor to surveil you. In fact governments sign agreements with other governments for them to surveil you while we surveil their citizens and trade information. This gets around the illegal act of government spying on it's own citizens. Your government mass surveil's foreign citizens. But they can't mass surveil citizens legally.