"Commander Pre didn’t discuss that most Mandalorians aren’t of pure-blood. I’m pure-blood from the old Clans. Satine wasn’t. Her mother was from Anaxes or Corulag."
Allow me to once again address that the Death Watch, or Kyr’tsad, were warlords and terrorists, not the honorable warriors Vizsla cites in his speech.
In fact, the Kyr’tsad betrayed the True Mandalorians under Mand’alor Jaster Mereel and in fact killed the Mand’alor himself, leaving the remainder of the True Mandalorians, now under Jango Fett - Mereel’s adopted son - behind on Galidraan to be massacred by the Jedi.
After that, all members of the Kyr’tsad were declared dar’manda and aruetiise. Soulless, traitors, outsiders - not Mandalorians.
The Death Watch aren’t the “descendants of the true warrior faith all Mandalorians once knew,” they’re a bunch of lowlife, traitorous scum who tried to kill off the actual honorable warrior culture.
A culture that isn’t based upon blood at all. One of the phrases that defined the Mandalorian culture is aliit ori’shya tal’din, or ‘family is more than blood.’ Meaning that it doesn’t matter what kind of heritage you have or where you come from, if you follow the Resol’nare, you’re a Mando’ad. In fact, there is no such thing as a “pure-blood from the old Clans” because even the members of those Clans weren’t “pure-blood.” It’s a culture, not a species or a race or an ethnicity.
(Thank you for pointing this out, but it would just like to add that at one point in time, there was a true race of Mandalorian’s, the Taung. However, through time and the acceptance of other races into the culture, and the loss of the Mandalorian War, eventually wiped out the Taung, and it was then that the Mando’ade became a culture and not a race.)