What induces the believers to admonish those who disobey God?

Verses 163-166 of Chapter 7:

And ask them about the township which was situated on the sea shore. Remind them of what befell its people who used to break the Sabbath (Saturday). Each Sabbath-day the fish appeared in abundance before them on the surface of the water but did not appear at all on other days than Sabbath. This was because We were putting them to test on account of the acts of disobedience they did. Also remind them that when some people from among them asked the others the answer that was given by some of them, "Why do you admonish those people whom Allah is about to destroy or punish severely?" they replied, "We admonish them in order to be able to offer an excuse before your Lord and we also hope that they might refrain from disobedience to Him." However, when they totally forgot the teachings they were reminded of, We saved those who used to forbid evil, and seized with a severe scourge all others who were transgressors, because of the acts of disobedience they did. But when even after this they disdainfully persisted in that from which they were forbidden, We said to them, "Become apes-- despised and disgraced!"