First of all, it's Purgatory. If you are going to mock and proclaim your morality superiority, at least know how to spell what you are dismissing correctly.
I think it's great when people are so secure in their path to salvation, whatever road it is and what form salvation is (be it inner peace, nirvana, Heaven, etc...)
I personally don't understand why one needs to put down other religions, particularly beliefs a lot older than the ones said person is espousing. It's offensive, disrespectful, and to me illustrates a lack of confidence in their own belief system. Or at the very least a lack of understanding of the Beatitudes (asserting your religious superiority isn't very meek).