I have seen that Twitter exchange between Hotez and Joe Rogan, it is quite humorous and also frustrating at the same time. I really find it disingenuous when someone refuses or is unable to backup or argue for their claims. If you believe you are right, then debate. If it is easily proven, then come cite the studies and data and prove it in front of everyone. Sunlight is the best disinfectant, and that is why I am skeptical of anyone who refuses to debate their ideas.