Note that the scriptures you have shown were all written AFTER God raised up Paul (3 out of 4 actually written by Paul).
Lev 20:24 (KJV)
(20:24) But I have said unto you, Ye shall inherit their land, and I will give it unto you to possess it, a land that floweth with milk and honey: I [am] the LORD your God, which have separated you from [other] people.
Deut 7:6-8 (KJV)
(7:6) For thou [art] an holy people unto the LORD thy God: the LORD thy God hath chosen thee to be a special people unto himself, above all people that [are] upon the face of the earth. (7:7) The LORD did not set his love upon you, nor choose you, because ye were more in number than any people; for ye [were] the fewest of all people: (7:8) But because the LORD loved you, and because he would keep the oath which he had sworn unto your fathers, hath the LORD brought you out with a mighty hand, and redeemed you out of the house of bondmen, from the hand of Pharaoh king of Egypt.
God chose Israel for a purpose and He is not finished with that purpose.
Matt 15:21-28 (KJV)
(15:21) Then Jesus went thence, and departed into the coasts of Tyre and Sidon. (15:22) And, behold, a woman of Canaan came out of the same coasts, and cried unto him, saying, Have mercy on me, O Lord, [thou] Son of David; my daughter is grievously vexed with a devil. (15:23) But he answered her not a word. And his disciples came and besought him, saying, Send her away; for she crieth after us. (15:24) But he answered and said, I am not sent but unto the lost sheep of the house of Israel. (15:25) Then came she and worshipped him, saying, Lord, help me. (15:26) But he answered and said, It is not meet to take the children's bread, and to cast [it] to dogs. (15:27) And she said, Truth, Lord: yet the dogs eat of the crumbs which fall from their masters' table. (15:28) Then Jesus answered and said unto her, O woman, great [is] thy faith: be it unto thee even as thou wilt. And her daughter was made whole from that very hour.
Note that it was not until this woman humbled herself to the Master and His children that He would even speak to her.
We are in the BUT NOW time where God is freely offering His grace to the world. That time will come to an end one day and God will judge the world.