Yes.
Israel as a nation has been lost for 2000 years even though mercifully, many Jews have received Christ.
But soon Israel will be found of God and “all Israel will be saved” (Romans 11:26)
What do you think that means? That anyone who has any Jewish DNA will be saved?
I've read that 40% to 45% of Spaniards are estimated to have traces of Sephardic Jewish DNA. Will they be automatically be saved because of those traces?
Jews are not the Seed of Abraham. “If ye belong to Christ, ye are Abraham’s Seed.” Galatians 3:29