But even granting the role of tradition, I think it’s an overstatement to blame premillennialism on the Plymouth Brethren. It has a long history starting with the church fathers and extending right through the Reformation and the Puritan era. The State of Israel today is quite imperfect, but not insignificant.
Premillennianism is a theory that was floated by SOME of the ante-Nicene fathers. It was never more than a theory, and its serious consideration didn’t survive the time of Augustine. It was never authoritatively taught by any church of apostolic origin. Its modern incarnation, taught as an article of faith, is a late and exotic novelty, entirely outside the Christian tradition.
We have no reason to perceive any providential motive in the existence of the State of Israel.