Throughout the Old Testament, God makes promises to the Jewish people. At least 17 times God or God's prophets speak of "everlasting covenants" made to God's people to protect them, love them, be with them, and be their God. God specifically tells David in 2 Samuel 7 that his kingdom will be "made sure forever before Me" and God will not take away God's "steadfast love" from David's descendants (that is, the Jewish people). God chose the descendants of Abraham and David to be God's people forever.
As a Christian, I believe that Jesus came and amended that promise so that all the world might be adopted into God's people. But that original promise was never erased. Even though I may disagree with my Jewish neighbors on who Jesus was, we remain part of the same religious family tree and share the "everlasting covenants" of Abraham and Sarah and David. Even in the New Testament, St. Paul says explicitly, "Has God rejected His people [the Jews]? By no means!" (Romans 11:1).
If you are someone who believes that Jews are evil, or enemies of Christians, or a threat to civilization, or need to be opposed in the name of God, then my question is simple. If God has abandoned the "everlasting covenants" of the Old Testament, then what's to keep God from abandoning the promises made in Jesus Christ? What does your scorn of the Jewish people say about God's eternal nature?
How can you trust a God who has reneged on promises to the Jewish people to uphold promises made to Christians? Either God is trustworthy or God is not.
I will put my trust in the God of welcome and reconciliation (2 Cor. 5). I believe yours is a liar.
From the Gray,
“If our hearts have turned to stone, there is hope; we know the rocks will cry out.” -Jars of Clay, “Shelter”