J. Brent Walker, Executive Director of the Baptist Joint Committee, responded to Hamburger's claims noting; "The fact that the separation of church and state has been <answer>supported by some who exhibited an anti-Catholic animus or a secularist bent</answer> does not impugn the validity of the principle. Champions of religious liberty have argued for the separation of church and state for reasons having nothing to do with anti-Catholicism or desire for a secular culture. Of course, separationists have opposed the Catholic Church when it has sought to tap into the public till to support its parochial schools or to argue for on-campus released time in the public schools. But that principled debate on the issues does not support a charge of religious bigotry"
What does Walker feel does not impugn the validity of the principle of separation of church and state?
supported by some who exhibited an anti-Catholic animus or a secularist bent