They are attempting to paint Bitcoin and Cryptocurrency as the devil to convince law makers to give them all sorts of extra powers...
The 1% get a bit nervous when the peons find new ways to circumvent their systems (fiat banking) and start to discover ways to cut them out of the loop.
Besides, if everyone is using a mixer, are they going to accuse everyone of being a criminal? We'd all be much "safer" if everyone used anonymizing services... They can't arrest everyone
It's all part of the post-privacy way of thinking. The whole narrative about having nothing to hide.
When everyone claims that they having nothing to hide, people who want to keep some form of privacy are automatically suspicious. Private individuals become more and more transparent while governments and corporations become more and more opaque, while ideally it should be the other way round. You can see a similar way of thinking surrounding the TOR browser.