Real dharma is sarva-dharman parityajya mam ekam saranam vraja [BG 18.66]. This is dharma. All bogus type of dharma – Hindu religion, Muslim religion, this religion, that religion – they are not dharma. Therefore it is said here, sa vai pumsam paro dharmah. Parah means Supreme. What is that? Yato bhaktir adhoksaje, “Wherein this is taught, ‘Just surrender to the Supreme Lord, Krishna,’ that is first-class religion.” All other religions, they are bogus. That is not religion.

Srila Prabhupada, SB 1.2.6, Calcutta, February 26, 1974