Sorry, but the conflating of Christian fundamentalists who might argue with you and Muslim fundamentalists whose goal is to kill you is indeed a problem. It stigmatizes a large, law-abiding part of our society and it diverts attention from our true enemies.
Well said. By the definition of the word, "fundamentalism" demands we examine what those adhered fundamentals are.
Fundamentalist Leninism is different than fundamentalist Islam, is different than fundamentalist football, is different than fundamentalist Christianity.
To make "fundamentalism" some sort of pariah is fundamentally absurd.