Yes, Jon Jones should have been pulled from UFC 200 because he did not follow the rules and regulations of the sport. It is not fair to only pull some athletes from their sports, and not others. Overall, Jon Jones made a mistake by doping, but he made is consciously, and therefore knowing that he was violating the rules.
Jon Jones was pulled from UFC 200 because of a potential doping violation. I am in full support of this decision for many reasons. I am sure Jones was well aware of the UFC policy when he allegedly used banned substances. Failure to follow the guidelines in place should result in appropriate punishment, no matter who you are.
Yes, it is important to take potential doping violations seriously. Athletes who violate the rules by taking banned substances endanger not only their careers, but the industry as a whole. Until the investigation is over, it is wise to pull Jon Jones out. If the investigation shows there were no violations, then he can be reinstated and compensated for lost wages.
Jon Jones did not deserve to be pulled from the fight ring for the sake of rumor. People are endlessly trying to defame one another, and the doping allegations are just another example of said foul tactics. Until there are substantial claims, validated by medical professionals, due process should have its course.