Fisherman:
Everything considered, wt interpretation based on 70 years ( FDS appointed circa 1919) has not been been debunked, ( if one is looking for relevancy of this subtopic ). We know that the FDS is not Judaism or Islam or other religions, it needs to be Christianity and since the churches of christendom failed to stop JW as hard as they tried, that eliminates christendom. 7x, 1914,1919, appointment of fds depends on 70 so that proves relevance.
Apart from the 'faithful slave' being from a Christian parable (rather than applying to some other religion), everything else you said here is nonsense. JWs are just another minor fringe Adventist Protestant denomination, rather than the uniquely hated group of global significance that you seem to imagine. The Bible Students' claim that the 'great tribulation' would break out suddenly in October of 1914 was entirely wrong (and Russell didn't believe that Satan was cast down to earth in 1914 or any other year). In the early 20th century, Russell said that if a European war were to break out, as had been expected since the late 19th century, that it wouldn't be the 'end' that they were expecting. Instead Russel expected a social upheaval rather than a world war to initiate the 'great tribulation'. Every aspect about what the Bible Students expected to happen in 1914 was wrong, but in their delusional pride they latched on to the wrong event in the wrong month and ran with it. See also 'sunk cost fallacy'.