is hyman roth considered a don??

Welcome, Don Pescara!
No, Roth is not a don. Though he's powerful and influential, he has no family. Instead, he operates through allies, like the Rosato brothers and earlier, Vito Corleone.

Just to add one other thing to Turnbull's statement: Roth was Jewish and could never be part of the Sicilian Mafia. The "rules" stated that one must be able to trace 100% of his roots back to an Italian/Sicilian heritage.

In the days of Masseria, you had to be 100 % Sicilian (so mother en father being Sicilian), that's why the Napolitano Alphonse Capone could never be a member of the maffia.
Nowadays, rules are changed, and I think only your father has to be Italian, but I don't know for sure.

Turnbull? Correct?

yes he was simply a jew and therefore could not be a don

interesting enough though that he actually saved clemenza from being hit by a car when they were both very young

According to Joe Pistone in his book, "The Way of the Wiseguy," now you only have to have an Italian (not necessarily Sicilian) father to be made.
BTW: While Masseria was a "Moustache Pete," some non-Sicilians were made during his era--Joe Valachi and Vito Genovese (Neapolitan) and Frank Costello (Calabrese). Capone's outfit was never a Mafia family.

So Valachi really lucked out. He was made when he "shouldn't have been" did not have to physically murder anyone (just rent an apartment) and then turned on 'em.

Well, we all like to believe that the Mafia has "rules" that are applied across families and are actually enforced. In real life, rules never applied across the board and nobody was going to enforce them across families.
The original Mafia families in America were all Sicilian. Most members were related by blood or town of origin. But business expanded during the Twenties, and they needed more manpower to do their business.