Why can't Trump disavow the Charlottesville neo-Nazi carnage?

I don't normally agree with Mathew d'Acncona, but this article is superb and nails it:

https://www.theguardian.com/commentisfree/2017/aug/13/charlottesville-white-supremacists-donald-trump

I am more than happy to agree with a moderate Conservative like d'Ancona or moderate Democrats like Viginia's Governor Terry Macauliffe and attack the extreme right; unlike Donald Trump. I could quote the whole article but here is a taste:

[quote] Only last week he (Trump) threatened a distant dictator with “fire and fury”. Yet, confronted with homegrown bigotry and its violent consequences, he dons the kid gloves of a politician anxious not to upset the militant wing of his base.[/quote]

[quote] It is hard to say how far he shares the alt-right convictions of his chief strategist, Steve Bannon, who believes that the essence of American identity is Judaeo-Christian nationalism and that this identity is in mortal peril. But, as candidate and president, he has been quite happy to surf on a tide of white resentment, careful not to disavow strongly the support of extremists and bigots.[/quote]