And EVEN NEGEF U'L'TZUR MICHSHOL ("a stone for stumbling over and a rock for falling over" YESHAYAH 8:14). They stumble because they have no mishma'at (obedience 1:2,14,22; 4:17) to the Dvar Hashem which is also what they were appointed for [2K 2:9,12,17; Yd 1:4; Ro 9:14-24].