Just because you are wrong all the time Ph, it does not mean that Mueller has to be.
You need to extricate yourself from that intellectually black and white world in which you live. Really, you do.
In addition, I am not sure at this point if Mueller hired Strzok for his Russia, Russia, Russia probe, or if Strzok was simply assigned earlier - perhaps by McCabe - to investigate Russia, Russia, Russia and Mueller chose to retain him only to discover what a leper and malefactor Strzok was for Mueller's investigation.