The best Vietnamese food I've had was at a restaurant in Nahariya, Israel. Went there many times from late 1983 through early '88 (during multiple Middle East visits). Early on they billed themselves as a "Chinese" place, but once customers caught on to how tasty the Specialty dishes were they dropped the pretense and went full Real Deal. Started by a couple from Saigon…they retired long ago.
There's a small Vietnamese community in my locale, with some fine restaurants, but nothing better than that little place on a street divided by a canal.
-Dave-