i dont believe he was rude... we need to understand B.I's been a leader for Team B for around 2 years now, he's grown attached to his current members. Now since theirs going to be a change, the other official members of Team B that arnt confirmed will end u leaving YG or wait more than 8 years to have another chance to debut. So it will take more than 5 minutes for him to warmly welcome the trainee.