You can say this same thing about almost any scientific finding.
A less controversial example:
General Relativity is extremely odd and widely accepted.
If someone refuses to believe General Relativity, would you really say the problem is "failure of communication"?
Any kind of meaningful communication on the subject would take years, and also (if you insist in not trusting others) require a lot of expensive experiments to be carried out.
Any "communication" short of that is in a sense propaganda; in that how believable you make it seem to the layperson is not correlated with how true it is.
No, rather than a problem with communication, the problem is arrogance in believing that General Relativity (or Climate..) is something you can have an opinion about without years of physics training.
(There are physics professors that may dispute GR. That is fine; it did not seem that your topic was communication with sceptical academics in the climate sciences)