Union with the Nations means Separation from God

To make a league with the nations round them, was to be joined to them, and that meant separation from the presence of God. The presence of God was the one thing that would make and keep the people of Israel separate from the nations, and His presence could have no other effect than that very thing. The presence of God will do the same thing in these days, for He changes not. Therefore if one should say that it is not necessary for the people of God to be separate from the nations, he would really be saying that it is not necessary for them to have God’s presence.EVCO 397.3