Naww....

Just common sense.. You have to show a passport to leave; so you flash
one coming back in;
- answer the questions, & you're on your way..

& most euro's have passports, so it Won't restrict tourism ..
&
We Don't lose the right to travel freely..
Trave anywhere you want..
Syria, Lebanon, Saudi Arabia , North Korea
( joke here.. )

just needing a U.S Passport to get in

keeps the riff raff out..