Its not a show. He's a passionate guy, he was like that as a player too.
But yes, I agree fully with the last statement. Allegri has been amazing in the CL, unlike Conte. Allegri had no right to be competing with the likes of Barcelona and Real Madrid in Europe, the fact that he's reached two CL finals in four years at Juve is an amazing achievement. Yes, as a Juve fan you'd like to have won at least one of those finals, but the fact is, I doubt many of you expected to reach two finals beating Barcelona and Real Madrid on the way.
Going back to Conte, its ridiculous how managers are evaluated these days. Conte won the league with an almost record number of points last season taking Chelsea from seventh to first. Is he not allowed to have an average year? I would keep him if I were Chelsea, I think overall he's been a good appointment for them.