A few quotes from the Rabbi on 'Love of Israel'
in which he teaches to return the lost property of your apostate brother, so as not to lose the renegade and to bring him back.
One should reflect on what Rabbi says: 'with anything that your fellow loses, including the rebel'– Why did the Torah commanded us to support those who transgressor the Torah's words?...The simple explanation for this is that despite that in these times a rebel would be considered a transgressor, one must in all cases learn from the Holy One blessed be He's attributes, who keeps his temper with wrongdoers in case they do penance…If so, it should also be so with a rebel. Even though he is outcast because of his transgressions, once he has regretted them seems appropriate - since the Scripture reveals 'with anything that your fellow loses' – that even if he is a rebel it is our duty not to let him descend to the depths.
Land of Israel sermon, in Peter Rehem, p.34, Jerusalem, 1961