Regarding why Hamas carried out the training so openly, it’s a good question. The “standard” answer is that they were trying to essentially condition Israel into not paying attention to big moves in the vicinity of the border, “Oh just another big drill,” but that kind of falls apart because they were escalating the frequency & intensity of the drills as 10/7 approached, which would clearly suggest something not standard
Regarding why Hamas carried out the training so openly, it’s a good question. The “standard” answer is that they were trying to essentially condition Israel into not paying attention to big moves in the vicinity of the border, “Oh just another big drill,” but that kind of falls apart because they were escalating the frequency & intensity of the drills as 10/7 approached, which would clearly suggest something not standard