It’s true that there’s a lot of overlap between creationists and global warming deniers. Lots of creationists have been conditioned to reject claims of scientific consensus, and so throw in with the deniers.
However, the global warming deniers know that creationism is bad science, and that linking themselves to it would just be embarrassing, which leads to the possibility of internecine warfare, as creationists try to glom onto global warming denial and global warming deniers try desperately to shake them loose.
To whit, this slide from a presentation by global warming denier Richard Lindzen:
I’ll save refutation of Lindzen’s characterization of the IPCC process, and indeed his dismissal of climate science as an enterprise, and focus for now on the red bit, where Lindzen uses intelligent design creationism as a metric for arguments with no intellectual rigor. And next time creationists try to cite Lindzen in support of their attacks on scientific consensus, toss those words back in their faces.