DD , as I understand it, in Russel's day, the JW teaching offended a lot of people and and many Religions got angry and they used their polital power to try to kill the founding fathers of the church. Also, they taught what they believed to be true even if they were in error.
Pastor Russel put his faith in the Almighty and did his work trusting in the Almighy. For some reason the Almighty liked Pastor Russel and chose him and worked exclusively through him and then the watchtower till this very day. God has in the past allowed HIS people to believe and teach a lot of erroneous things but they were still his people. Why God allows these things? I dont know. BUt if the teachings start falling apart, I see a serious problem and at some point, God is going to have to step in.