But as always you did go way too far when you said the OT tribes were not God's chosen people in OT times. Those were God's own words about them He repeated over and over and over again throughout the OT. I'm not going to quote all those verses where God said that, because it would fill up the entire thread. Its just another example of you rejecting God's own words in scripture.

They indeed were a picture of the coming church age as well, virtually all denominations agree on that. But Jesus still came and offered THEM the Kingdom and as written, they broke the covenant and rejected Jesus when He came and so the Church age began.

But the church age is not the eternal state. The church age has a beginning and an end. Scripture makes clear God has NOT cast them away forever.

Romans 11:25 & 28

For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.

As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes.