Romans 11:28-29 — As far as the gospel is concerned, they are enemies on your account; but as far as election is concerned, they are loved on account of the patriarchs, for God's gifts and His call are irrevocable.
enemies for your sake — God is judicially opposed to the Jews because of their disobedience, and owing to this, He is bringing Gentiles into the mercy from which Israel as a nation has been temporarily excluded.
for the fathers' sakes — becasue of God's covenant promises to the fathers.
gifts (Romans 9:4-5)
calling — divine relationship
without repentance — God is immutable. His promises don't change based on the attitude of men but will be fulfilled.
as touching the election — believing remnant is loved
for (verse 29) — continues the thought at the end of verse 28.