R’ Menachem Mendel Morgenstern zt”l (Kotzker Rebbe) would say:
“Why is a בן סורר ומורה - rebellious son, put to death? He is still so young - can’t he do Teshuvah? Because not only has he strayed from the true path of Torah, he is a 'מורה' - teaching others to stray as well. This crime is greater than that of the one who kills another. For if one kills, his victim loses this world but still has a part of the next world. However, when one causes another to sin, he is causing his victim to lose both this world and the next world, as well.”
A Wise Man would say:
“No medicine cures what happiness cannot.”