Great job Vabs! I'm happy to see that he will not be destroyed just because of his breed.
Now, down to business.
If he is allowed on people furniture and/or he is allowed to eat/beg for people food...
He will begin to think he is an equal in your pack, and will eventually decide to compete for the Alpha Male position. When he begins to build his confidence he will challenge the pack member that he sees as the leader.
Dogs are dogs, and need to be treated as such. They are not children. Strong breeds need strong leadership and consistent rules to be happy. If he knows you and your boys are his dominants, he will gladly follow and protect your family.
Happy puppying, even if it is just temporary.