Indeed! And the climate-deniers being talked about are very far indeed from truthful or scientific, so there's no point in doing anything to aid their campaign of deceit. They'll lie about it either way.
Justifying bad action (hiding or misrepresenting data, allowing untruthful hyperbolic statements, ad hominem attacks) on the basis of hypothetical bad action is hardly helpful.
> climate-deniers
I've never heard anyone deny the climate.
I've never actually heard anyone deny climate change, except those who assert there was no significant change before the 19th or 20th century.
Very few even deny anthropogenic climate change - most just question the magnitude, relative attribution, or whether it will be easier to adapt rather than attempt to prevent.
You probably meant "catastrophic anthropogenic climate change denier", which is just an intentionally offensive way to say, "Someone who disagrees with the consensus position so we hope you'll ignore them".
They must be given every opportunity to criticize. They don't need to be given the same attention, but have to be allowed to criticize or else we create sacred cows.
Indeed! And the climate-deniers being talked about are very far indeed from truthful or scientific, so there's no point in doing anything to aid their campaign of deceit. They'll lie about it either way.