Ah... hmmm. Have you considered that "hell" is not only in the Bible many times, but Who used the word?
Mark 9:43-48 - And if thy hand offend thee, cut it off: it is better for thee to enter into life maimed, than having two hands to go into hell, into the fire that never shall be quenched:
In the Bible Christ warns about hell many times. This person was not doing that.
As a Catholic, I found it offensive. Think about the tone of the messages.
How would you like it is someone said the same about all Protestants or non-Catholics?