Has little to do with breed but more with socialism and training as a pup.
No room for any aggressiveness in my kennels, period.
Though I agree that nurture has some influence, nature will always be the dominant factor. Some dogs are just hard wired aggressive.
And, YES, male dog aggression is a big issue in the Lacy breed. I do not know why but I do know that I see it more, per-capita, in the Lacy breed than any other. That's not to say that they all posses this trait though. Many do not.
And, as a Lacy man, that is just one reason that I advocate responsible breeding and hard culling so strongly.
Steve