Your post was enjoyable to read--------the verses you included in your post confirms why the gathering of the church have to be on tabernacles------Paul says: "Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him." 2Thess. 2:1----------That word gathering speaks volumes because it is the whole theme of the feast of Ingathering(or tabernacles)--------as stated in the verses you provided as follows: "You shall keep the feast of "Tabernacles" seven days, when you make your ingathering from your threshing floor and your wine press. Deut. 16:13------------"You shall keep the feast of "ingathering" at the end of the year." Exodus 23:16------------"And you sh! all observe the feast of weeks, the first fruits of the wheat harvest, and the feast of ingathering at the year's end." Exodus 34:22.
 

In Christ,
Granny Priscilla.