Why do global warming deniers whine about scientists supposedly not wanting to debate?

Why do global warming deniers whine about scientists supposedly not wanting to debate, a claim that is a lie, but yet treat Yahoo Joker and his socks, who are clearly out to suppress debate by spamming and moving questions?
Update: And, the claim that scientists are not willing to debate is a lie.
https://www.youtube.com/watch?v=l9Sh1B-r...

Yes, the video is long. Watching it is optional. The point is that scientists are indeed willing to debate.

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