Destiny Church leader Brian Tamaki has launched an astonishing attack on the gay community.

He's blasted what he calls "gay power", and says it's the biggest problem facing the world. Mr Tamaki warned his followers of an entire generation of children being bisexual, saying the perversion of homosexuality is leading the charge.

Mr Tamaki said he's shocked in particular at the decision to endorse gay marriage in Ireland.

And he's warned of an entire generation of children who'll be bisexual, saying the perversion of homosexuality is leading the charge.

Green MP Jan Logie said it's an astonishing attack.

"I speak for myself when I say I find it offensive that my identity as a person and who I am is being described as something that is open to influence by political whim."

Jan Logie said it's a warped view if the love between two people is being described as the biggest problem facing the world.

"He seems to be reverting to messages of hate as a way of trying to gain support for his own mission."