A 'Mitch' is a variety of human being, that is both extremist, and non-accepting of other people's beliefs.
The
standard Mitch is generally Christian to the extreme, and unable to take in another person's beliefs. If
someone was being a Mitch, he or she would be behaving in a way that shows he or she knows nothing about any other
belief other than their own, and that it gives them the right to defend it at all costs. If someone were 'pulling a Mitch', they would be behaving in a way that shows they are extremely closed-minded, while continually telling themself that they're actually incredibly open-minded, when it is simply not the
case.
Extremist, and one-sided.