The ability to think critically and not brush everything off as BS and call everyone a nutjob is the sign of an inquisitive nature.
Believing everything you are told like a good little robot is the sign of an idiot.
Also anyone noticed something ? Whenever someone brings something like this up that person, Me in this instance, Is usually attacked, Called names and then made fun of, Weird that isn't it.
Yes, think critically.
Simply by using the word "chemtrails", you are stating that they are chemicals being deliberately released from almost all jet-powered planes.
So you are saying that there is a massive global conspiracy by some incredibly powerful secret group that controls the use of all planes that are powered by jets, which nowadays means almost all plane use and definitely all use of large planes. That is not very plausible.
You are also saying that despite the vast size of this conspiracy (both in terms of scale and in terms of the number of people involved) it has been kept absolutely secret. That is so implausible that it's pretty much impossible.
You're also saying that despite the requirement for absolute secrecy the conspiracy has decided to make their SECRET CHEMICALS as extremely visible as they possibly could. That doesn't even make sense within the context of the conspiracy belief - it's not internally consistent.
You're also saying that despite the global and immense power of this secret conspiracy, they choose to carry out their Secret Plan to dose people with chemicals by releasing those chemicals into the air in varying locations (which the conspiracy don't control) at high altitude, where the chemicals would be distributed in a way the conspiracy can't control. So the dose people get would vary wildly and not be in the control of the conspiracy. That is not how a conspiracy with immense power globally would carry out a plan to dose people with secret chemicals. So that too doesn't make sense even within the context of the conspiracy belief.
So you're believing in a conspiracy that makes no sense at all. It isn't internally consistent, it isn't consistent with reality and it doesn't explain the evidence.
The alternative explanation is a well understood process (condensation) that is consistent internally and externally and explains the evidence.
Thinking critically does not mean believing in nonsense because someone has said that nonsense.