yelling at Bibi has been a core job requirement since Clinton. If he can't do it we need to figure out an accommodation but it's not a strike against him that he can.
Read the Times story about Biden. They say he seems more visibly exhausted and physically frail than years ago, confuses names more. No real accusation of mental problems. Includes an anecdote of Biden yelling at Netanyahu. Sources speculate his schedule is too demanding relative to his age.
