The apostle Paul was just as much a victim of the deceptions of Satan as we. He, too, had to have the "scales" lifted from his eyes, so he could see the truth of God.
Now that sums it up, I think, about as well as any series of verses in the entire Bible. We cannot trust the record—the tradition—of the Jews in regard to spiritual things because they were just as unconverted as we were.
So, we see a summation here in Romans 10:1-3, that the Jews are not to be trusted any more than any other people in regard to spiritual things. They had erected a system of worship that is called Judaism; and, oh, it was strict. Oh, they were zealous for it; and, oh, it was done in the name of God (just like "Christianity" today). But this religion was in agreement with their own character—not the mind of God! We have just seen the witness of that in God's Word. They were not in agreement with God. Some were doing things right, but the vast majority were not—even as it is today.