Why are climate deniers usually anti-immigrant?

[muon2]

I suggest that the correlation comes from the political connection at the time the issues really connected with the public. Pubs controlled the Senate at the time of the Kyoto climate agreement in the late 1990's. It wasn't a good deal for the US with respect to trade compared to India and China but the Senate could finesse the diplomatic issues by attacking the science (which wasn't so well established then).

There was a renewed push for official English language laws in the mid 90's as well, driven in part by the new Pub majorities. Laws were passed in AK, GA, MO, MT, NH, SD, VA, and WY, adding to the dozen states that responded to the original push in the 1980's. At that time the debate in most states was about immigrants, not illegal immigrants which only became the talking point after 2001.

So by the end of the 1990's many of the same Pub leaders were speaking against both climate change and excessive immigration. That message stuck with their supporters, and is now part of the canon 20 years later.