Kaput,
"There is no indication"
They don't necessarily know so they assume that they did not do it . But you know what happens when someone assumes something, they become the first three letters of the word.
Just because the Isrealites did or did not do something, does or does not make it right for us. They made a practice of worshipping false Gods even though they were God's chosen people. So, since the Isrealites made a practice of that should we follow that? Rachel stole an idol from her fathers house, making stealing and idol worship okay? There were also temple prostitutes, should we make a practice of that, I know quite a few witness sisters that would qualify? I know many JW's that have tattoos, should a person be expelled for that because the Isrealites did not make a practice of that? The Isrealites men made a practice of wearing dresses and beards, would it then be appropriate for JW's to run around in that manner? Also, the Isrealites practiced polygamy. In fact, King David, who was a man after Jehovah's own heart, practiced adultry, polygamy and murder. Do we then imitate his practices? Lot, a righteous man, had incestuous relations with both of his daughters, would that make it appropriate for fathers to impregnate their daughters? They also made the practice of stoning people, do we make a practice of that?
Our wedding ceremonies are steeped in pagan ritual, more so even than birthdays, yet JW's continue to observe many of these traditions. They, JW's, throw baby showers that are just like a birthday party, there are cakes, punch and gifts for the birth of a child. Is that not a birthday party? There are so many double standards for the JW's the hypocrasy is sickening.
Also, the society has translated things so that it suits their purpose. {I have seen other translations that translated the passage in Job as birthday.} As it has been shown over and over again on this sight. And, the Quotes site, that they were so scared of they sued the guy to remove it.
Like I said if it doesn't suit their purpose it isn't right. At least until next watchtower or maybe the next. But then again, they might decide to change it again after they changed it again after they changed it again, etc.etc.etc. So, long as it suits their purpose.