Why are you so incensed by this? Does it make any difference at all if you know that the only other country in the entire world that taxes based on citizenship

Why are you so incensed by this? Does it make any difference at all if you know that the only other country in the entire world that taxes based on citizenship rather than residency is Eritrea? Even assuming you grant that the state is a reasonable entity to begin with and it is due tribute from everybody whom it claims ownership over, why should somebody pay tax in a country they no longer reside in for goods and services they no longer make use of?