I think many of them don’t like Trump and are hoping that Mueller will find a real charge to file. This book will give them something to do for a few days. But arguably the fact that Bannon (alleged “white supremacist” etc.) trashed Trump (assumung that he actually did) is a positive for Trump among that group.
Yes, I'm waiting to see if there is any "there" there. Trump isn't going to make any friends among his liberal enemies, and I don't think he should be trying to make any enemies among his conservative friends. I would have contacted Bannon to see if there was anything to these accusations before I launched into an attack on him.
But yes, the anti-Trumpers, including the Liberals, are trying to find any excuse to take out Trump. These people didn't like Ronald Reagan either.