"So in general I have the right to hold an opinion ...... .Am I allowed speculate on the basis of my opinions?"

Ummm...sure. But your speculations and opinions are couched in that type of semi-reasoning and rhetorical questions that make it difficult to discern whether they are half sarcasm or total piss-take. Yellowcake? Sure... hidden away like the 100 MPH carburetor. Everyone knows it must exist because it IS so well hidden.
I suspect that because there have been some famous conspiracies, it has become a knee-jerk reaction for many to attribute ANY major incident to a conspiracy..... makes a better story, and they get press by continuing to counter facts by inventing even MORE complex stories to re-explain the inconvenient facts. When that fails, they just revert to restating the same assertions they began with... which shows how "melting beams" and "early BBC reports" and "missles at the Pentagon" continue to pop up long after they have been refuted. They seem to hope...or count on... folks just getting tired of RE-refuting the same theory for the 27th time.

Ah well... it's a hobby......