I am not from Jehovahs Witness Organization but what I know the Watchtower teaches I can say the Muslim religion is of different type religion and it is not in line with the true teachings of the Bible.
What I feel is that in those years 1930s the Bible Students were on the move and known very much by the active and attractive teachings which could be a cause some other people tried to imitate them to some degree to keep his followers in and pull in new followers and be also attractive to the outside world.
The predictions of the end of the world keep believing people in high mood and give them energy and endurance .
I know of that as I have spent years dealing with the predictions of the end of the world. The present prediction I have for 2011 AD already energizes my life and I see a difference .
The true christianity is inseperable from the end-of- the world predictions.If you don't deal with the end-time predictins your religion might be dead.