Source: The Washington Post - Link
During Trump’s presidency, a focus on the safety of police officers was rolled into the president’s political worldview. He clutched law enforcement tight as he argued that his presidency was in essence the only barrier between order and chaos. Fox News hosts were happy to kindle that fire.
Then the Capitol was overrun by Trump supporters and Sicknick was killed. Fox News’s team appears not to be terribly interested in talking about any of that, and so it often doesn’t.
They only care about “blue lives” when it’s POC protesting.