So that means I’m the last full-blooded Italian-American in the country? Oh my! WOW!
I should get official government recognition and protection…with a pension and all…

Jokes aside,

Implying that “there aren’t full-blooded Italians anymore” is just false.
Demographically-speaking. Especially in the North East.

Implying that “all” wiseguys are mixed-blood is also false.
Some were, and some certainly are, but it’s not the absolute normality.

Always avoid absolutes.