> One of the best ways to fight climate change is to not make up numbers out of thin air
I can tell you one of the best ways to fight climate change is not to spend 0 time reading someone's source to see what's going on with their numbers and accusing them of purposefully exaggerating instead. That's just using the guise of Wikipedia expertise to be lazy and stop a conversation before it starts
From their article, the "2.x" clearly comes from the fahrenheit number given. They likely meant 1.2 degrees C, measured from the preindustrial era.
(and you're clearly willing to speculate based on nothing but your feelings[1], so I'm not sure you have much of a leg to stand on criticizing like that)