Most people will not admit they are wrong. Wickipedia explains it this way;
“A series of psychological experiments in the 1960s suggested that people are biased toward confirming their existing beliefs. Later work re-interpreted these results as a tendency to test ideas in a one-sided way, focusing on one possibility and ignoring alternatives.
This passage emphasizes that ethnicity or bloodline does not determine God's chosen people or their standing with Him. Our Lord and the apostles taught that true worship and being part of God's people are matters of the heart, faith, and obedience, not ethnicity. Examples from scripture show that God's grace was extended beyond Israel to Gentiles, and that many Israelites who relied solely on their bloodline or outward appearances were rejected by God. The Bible highlights that being a "Jew"...
Here is a wonderful website from Chris and Karen Verschage, with similar information.
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