Still there was, as we see in the next chapter (2 Chronicles 18), a feebleness in Jehoshaphat that showed itself in this way, that he made affinity not with Syria, but with Israel. This was a grievous sin in the sight of God; for although it was an enormous thing to form a league with the Gentiles offensive and defensive, it was a most serious thing to take ground with an idolater. I do not speak of making use of the Gentiles. That was right. But Israel stood in a peculiar position (with its golden calves set up in Bethel and Dan) so that Jehoshaphat's affinity with Ahab its king was in a certain sense more guilty than a league with Syria. Why? Because they were the people of God in an idolatrous state. It is just the same thing now in tampering with Romanism, because the gravamen of the guilt of Romanism is not merely because Romanists are idolaters, but because they are idolaters, professing Christ, and baptized in His name. That is what makes them much more guilty in the sight of God than any heathens who have not heard His name and glory.