This should not even be a debate in Christianity, but Christians have been trained to misread and misquote this verse. So, I am putting together here a resource to help you deconstruct this bad teaching.
The core promise of Genesis 12:3 is: “I will bless those who bless you, and him who dishonors you I will curse, and in you all the families of the earth shall be blessed.” (ESV)
This verse, especially the final clause, becomes a foundational theme for the New Testament, explaining how the blessing intended for Israel extends to the entire world through Jesus Christ, the “seed” of Abraham. Even though this passage is often used to justify saying Christians should stand with the modern nation called Israel, I want us to look at how the New Testament itself quotes this verse, and similar verses. So that we can apply it properly.