Who became Paul's chief opposition when he preached — the Jews or the Gentiles?

Les explains that everywhere Saul, later Paul, went, he would first go to the Jews in the synagogue. When they rejected the Gospel, he went out among the Gentiles. But the Jews, not the Gentiles, became his chief opposition, opposing Christianity left and right. Israel as a nation opposed the Gospel and did everything it could to keep it from going to the Gentiles. Because of that opposition, God set a spiritual blindness on the nation, as illustrated by Paul blinding Elymas the sorcerer for a season. That blindness holds until this day, but it will not last forever.