A government MP has told outspoken Palmer United senator Jacqui Lambie that her mangled messages are damaging the anti-burqa movement in Australia, bluntly saying she should "shut up".

Queensland National MP George Christensen told Fairfax Media that while he agreed with the points Senator Lambie had been attempting to make regarding Islamic law and the burqa, she had no idea how to argue the case and was doing the campaign to ban the burqa a disservice.

"She goes too far and quite frankly she doesn't know how to argue the key point, she's doing the argument actually no favours and she should shut up because she doesn't know what she's talking about," he said.

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