> American laws also have universal jurisdiction
Some do, but...
> (for example, the Bill of Rights doesn't say, "unless you are located outside the US").
The Bill of Rights is a set of constraints on the US government, so even to the extent it applies to the government when acting outside of its borders [0], it isn’t an imposition of US law on the territory of other countries, but a limit on such imposition.
[0] And it doesn't fully, see, e.g., Johnson v. Eisentrager, 339 U.S. 763 (1950), subsequently limited somewhat with the core holding retained in Boumediene v. Bush, 553 U.S. 723 (2008).