Therefore thou hast forsaken thy people the house of Jacob, because they be replenished from the east, and are soothsayers like the Philistines, and they please themselves in the children of strangers.
Therefore, х kiy (H3588)] - rather, For: reasons why there is the more need of the exhortation in Isaiah 2:5.
Thou - transition to Yahweh. Such rapid transitions are natural when the mind is full of a subject.
Hast forsaken thy people ... because they be replenished from the east - rather, filled; namely, with the superstitions of the East, Syria, and Chaldea.
And are soothsayers - forbidden, Deuteronomy 18:10-14.
Like the Philistines - southwest of Palestine in antithesis to "the East." The Philistines delighted in divinations (1 Samuel 6:2). This sin of dealing with familiar spirits reached its height under Manasseh (2 Kings 21:6), and shall be a leading sin of the last days (Revelation 13:13; Revelation 22:15).
And they please themselves in the children of strangers, [saapaq, akin to caapaq (H5606)] - they join hands with (Maurer); i:e., enter into alliances, matrimonial and national, with pagan foreigners: forbidden, Exodus 23:32; Nehemiah 13:23, etc. The Hebrew means to have sufficiency (Buxtorf). Instead of making God their all sufficient satisfaction, they please themselves with the corrupt ways of foreign pagan.