Faith? Faith in what? Gal 1:8 "But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed. 9 As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be accursed."
Doesn't Paul sound like a nut case in your quote? He's saying no matter who contradicts him, "let him be accursed". No wonder Jesus in Revelation 2:2 praised the Ephesians for getting rid of Paul. Read Paul thoroughly and compare his doctrine to Jesus. You will see.
Patriotism (and religion) is the last refuge of a scoundrel.
