For instance many of these festivals are celebrated for two days, not just one as HWA assumed.
Aside from the high holidays, which ended last weekend, there are three main Jewish holidays ... Passover, Shavuot, and Sukkot. In the Bible, Passover and Sukkot are seven days and Shavuot is one day. In America, for Orthodox Jews, the number of days goes up by one for each. ...
The upshot, however, is an extra day of prayer (and no work) for Jews who celebrate the holiday in places like America, Argentina, England, even South Africa. The only place the extra days aren’t observed is Israel. (Slate, September 18, 2013.)The dates for the months of the years was determined in the Holy Land. Consequently it took time for Jewish communities elsewhere to learn when the dates of the months was set by the Sanhedrin in Jerusalem so the annual Sabbaths were celebrated for two days outside of the Holy Land.
... everyone who lived outside of Israel started doubling up on their holidays—observing two days instead of one, just in case. This way, at least one of the days was correct. (Slate, September 18, 2013.)Armstrongism says the Feast of Tabernacles looks symbolizes the Millennium. But Jews do not view it that way. To them it symbolizes the wanderings of the Israelites in the wilderness.
One Jewish tradition connected with the Feast of Tabernacles is to wave the four species. But HWA did not know about that so it was never a part of Armstrongism.
What folly it was for HWA to ignorantly take these festivals which are precious to the Jewish people and crudely exploit these festivals to prop up his own organization of followers. What HWA did to these Jewish festivals was wrong.