Perhaps... but this is just a transition. Species die out, cultures die out, and new ones are born. *shrug*
Am not saying they shouldn't be(though with Jango/Boba thats debatable for me....the absurd fans of those two have kinda pushed me away from them.), I just prefer the Taung when the Mandalorians were a specific group and not any that just someone could join if they proved themselves. It made the Mandalorians more unique and interesting.