Martin has gone too far for some Republicans. It wasn't just the defending of rioters.
"Among them: Martin's outspoken advocacy for defendants charged in the Jan. 6, 2021 attack on the U.S. Capitol; his past praise for an alleged "Nazi sympathizer"; and a series of letters he sent to medical journals, Wikipedia's leadership and members of Congress, which many interpreted as threats"
"Before his appointment, Martin promoted conspiracy theories about the Jan. 6 attack, including the claim that federal agents instigated the violence"
But he's been replaced with yet another Fox News host, Jeanine Pirro, a Trump loyalist who helped promote the false theory that the 2020 election was stolen from Trump.