pseudomartyr
/ˌs(j)uːdəʊˈmɑːtə/noun
A false or pretended martyr; a person falsely or erroneously called a martyr.
Origin
Late 16th century; earliest use found in Abraham Fleming (c1552–1607), author, literary editor, and Church of England clergyman. From pseudo- + martyr, after post-classical Latin pseudomartyr false martyr.