It makes a cold amount of sense; The west coast has been ripe for giant fires with all the refusal to do controlled burns allowing for utter flammable garbage to accumulate in the forests. It takes way less effort to spark that off than it ever would be to gather supplies for explosives, and you likely will cause more damage that way. So because of that, that is probably what is happening now; And if it wasn't happening at first I'm sure twitter planted the idea in their heads once antifa was accused of it ("But we didn't! Huh.... good idea though....").
Oh and for years conservatives have been bragging about how they would mobilize for guerrilla warfare in the hills; If you are the left and you believe conflict is inevitable, then obviously doing things like this to devastate the areas they would operate in would only be logical.
We'll see though, for all I know the "main" fires were completely organic and I am still jumping the gun; Even if they were not most centrists are just going to assume the right wing is just sperging out like the left wing on this.
Anyway, if it is all true, then whoever on the thread wanted them to radicalize to using Weather Underground tactics might have just gotten their wish from a Monkey's paw.