Well, one of the arguments in favor of these being more than condensation is that the trails don't just dissipate and instead hang around for extended periods of time, twisting into the atmosphere. I admit, a trail hanging out for half an hour or even for hours seems a bit peculiar to me, so I guess I could feel slightly suspicious. Also, supposedly contrails didn't used to do that. I'm guessing though that people just don't actually remember what contrails used to or didn't used to do.
Clouds are condensation. How do they hang around for so long?
Obviously the clouds are part of the government conspiracy too. This whole time. Who's going to question things if it's always been that way. That's probably how the planes fill up with chemicals. The clouds are reservoirs of chemicals waiting, floating around in the sky.