That's fantastic sharpshooting. One instance of assumption (that wildfires are caused by climate change) doesn't refute the human impact on climate change.
In addition, science has not yet made a conclusion on the forest fires (the governor may well be proven right), and the Siberian feedback loop is a wildfire and was caused by climate change.
The governor ignorantly commented on an unknown. Deniers deny known facts. There is a huge difference.