A fundamentalist Muslim preacher from western Sydney says Australia's acceptance of homosexuality is encouraging sex with animals, paedophilia and incest.

Hardline Sunni teacher Nassim Abdi delivered his rant about gay people, on the same day the Australian Bureau of Statistics revealed a 61.6 per cent national Yes vote for redefining marriage.

The Sharia law advocate also described homosexuality as a worse kind of sin than extramarital adultery because it was 'unnatural'.

'If you get to a level where you accept homosexuality, what is there not to accept?,' he said on Wednesday.

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