Now two countries may enter into an agreement not to surveil each other or their citizens. That is completely a different issue. But if you are not a US citizen or don't have a visa than the Constitution affords you no protections.
Now two countries may enter into an agreement not to surveil each other or their citizens. That is completely a different issue. But if you are not a US citizen or don't have a visa than the Constitution affords you no protections.
Yeah right.
In general, these are laws against things like war crimes. The UK (Brit here) also extends some child protection, fraud and bribery laws to cover acts worldwide, the former intended to be used to prosecute sex tourists who are unlikely to be prosecuted where they committed the offences.
I'm unsure whether any of these laws have actually specifically protected you, but the reason for their introduction is to afford people in other countries similar protection from UK-based criminals to the protections people enjoy in the UK.
It seems that Universal Jurisdiction allows people to prosecute me, but doesn't specifically protect me.