They don't make it harder to discuss climate change. People don't just go "a small group I hate cares about climate change so now I don't care". And if they do, well, they never actually cared about the climate. They cared about looking good and were never going to help with anything.
And stop with the conspiracy that they're funded by oil executives. The organisation of the granddaughter of an oil billionaire (who is dead) funds 2% of them. Because, children and grandchildren, believe it or not, can disagree with their elders.