Until you understand what the people at the top are capable of, chemtrails won't make much sense to you. If I started here, I would've had trouble with it as well.
You seem like you have an analytical mind. I challenge you to look carefully into 9/11. Open your mind and look at all the facts and just think about the official story and the gaps. Look at how WTC 7 went down. Consider whether the pancake theory really holds up (a tenured physics professor lost his job because he said it was physically impossible for the official story on how the towers came down to be true). Consider all these things - there are so many gaps it's ridiculous. Consider eyewitnesses who heard explosion in the tower basement *before* the planes hit. It stacks up so fast you'll realize we were sold a bill of goods.
See where it takes you and then you'll understand how chemtrails fit into the picture. If you can't see the more obvious things, the more clever stuff like chemtrails will elude you. I never thought much of them until someone pointed it out to me.