Look who is talking. The Australians are notorious for this sort of behaviour but they expect the other side to be nice to them. Even in this series, we have seen how Hazelwood and Starc have given send off to the Indian batsmen. So Johnson has no right to complain.
Yes he is young and energetic and passionate. Best that all cameras focus on Virat learn how to be focused than being frustrated. Johnson it will be frustrating to the bowler when he is clobbered to a boundary or a six.
Irrespective of how Australians behave and are perceived, I think Johnson is correct in his analysis of Kohli. Over the last 1 to 1-1/2 years it looked like Kohli was maturing, however truth and reality appears far from it. A Captain gesticulating and being very brashful in the field is not a good example of leadership. Only Skills, strategising, executing and focus on the game should be on the captain's mind, not indulging in theatrics. Whatever complaints he has on the field regarding opposition or any other matter, he should express first to the umpires diplomatically and also in official meetings with the Organiser's and Board, not crying hoarse and go public in media interviews. Biggest weak-link could be that when things don't go his way, he could get more frustrated, angry and break-up, rather than cool, more thoughtful and looking at strategies of turning around. Hope he learns and improves in the future.