I agree that it is not just the extremists who harbor bad thoughts or engage in bad acts but they are usually the source of the polarization and try to keep education and communication of the main stream from moving forward.
Extremists think 'communication' means agreeing with them.
The type of leukemia that I am dealing with is treatable. So if I do what my doctors tell me to do - get my blood checked regularly take my meds and consult with my doctor and follow any additional instructions he might make - I will be able to maintain my good health and live my life with a minimum of disruptions to my lifestyle.