There's more back and forth between former ministers and David Seymour over the Treaty Principles Bill. 

Thousands are joining the hīkoi protesting the bill - which will arrive at Parliament tomorrow.

Former Prime Minister Jenny Shipley said Seymour is 'inviting civil war' and former Treaty Negotiations Minister Chris Finlayson said it's doing 'great damage'.

Seymour responded by saying Shipley's comments were grossly irresponsible and Finlayson was showing haughtiness and bitterness.

Finlayson says his comments are immature. 

"I thought David wanted to debate the issues - but when people sort of try and debate them, he turns on them."

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