Reacting to an appearance by veteran Democratic strategist James Carville on MSNBC Thursday night in which he attempted to pour cold water on enthusiasm for Vice President Kamala Harris, the panel on “Morning Joe” hammered him for underestimating what is going on. With Carville giving a dark warning that Donald Trump and his allies are going to come after Harris hard with an avalanche of attacks, former Hillary Clinton spokesperson Jennifer Palmieri all but rolled her eyes and stated that his point was more than obvious — and he needed to dial down the doom. “I don’t understand why James has t…