The cross was on the cover of the WT until 1931 and not discussed as "pagan" until 1936.
*** yb75 pp. 148-149 Part 2—United States of America ***
Concerning the wearing of “cross and crown pins,” Lily R. Parnell comments: “This to Brother Rutherford’s mind was Babylonish and should be discontinued. He told us that when we went to the people’s homes and began to talk, that was the witness in itself.” Accordingly, reflecting on the 1928 Bible Students convention in Detroit, Michigan, Brother Suiter writes: “At the assembly the cross and crown emblems were shown to be not only unnecessary but objectionable. So we discarded these items of jewelry.” Some three years thereafter, beginning with its issue of October 15, 1931, The Watchtower no longer bore the cross and crown symbol on its cover.
A few years later Jehovah’s people first learned that Jesus Christ did not die on a T-shaped cross. On January 31, 1936, Brother Rutherford released to the Brooklyn Bethel family the new book Riches.Scripturally, it said, in part, on page 27: “Jesus was crucified, not on a cross of wood, such as is exhibited in many images and pictures, and which images are made and exhibited by men; Jesus was crucified by nailing his body to a tree.”
As to "hell" an exact definition has to be given before you can answer, who believes in hell; a fiery hell where people are tortured forever, then many religions don't believe that.
http://christianity.about.com/od/denominationscomparison/ss/comparebeliefs2_8.htm