Hi Everyone who replied!
Thanks for your thoughts. I noticed that some of you assumed that I'm kind of oblivious to the 607-1914 problem, but I know this subject very well. That is the main reason I won't write them about it because I suppose it will ring their apostate radar.
My case is actually to ask about these themes (the fullfilment of Daniel's prophecy and the prophecy of Jesus) since I don't see many 'apostate' material centered in that, most of the anti JW material focuses on the 607 issue. So I don't think they have a 'apostate radar' for these subjects. Anyway I'll take your counsels and be way more cautious.