Is climate change a hoax

First, you're generalizing.
Next, you're sinking into the massive narrative, that if someone disagrees that means they fall into a group.

Other than that you're also invoking political taglines in a subject (science) that's not supposed to be, never should have been, and cannot ever be made sense of if it's made political.

Politicians and grant subsidies have all but bought out science, lock stock and the kitchen sink.

Until you realize that, you'll be believing in all kinds of lies that are actually far less possible than you might realize.