The Talmud states that teshuvah done from fear renders one’s sins, even if they were done intentionally, as if they were committed unintentionally, but teshuvah from love actually transforms intentional sins into merits.

How is this possible?

I think the answer lies in the nature of love itself.  Love results in some degree of unity with another person.  To know the other intimately, as a whole person; is to understand not just what I see of them, parts of them, but all of them as a whole person.   This holistic perspective then enables me to see their faults and their weaknesses in a totally different light, because every weakness is also a strength, and love enables us, by identifying with the other, to see their whole person, not just bad or even good parts of them.

We must strive to see the Jewish people in this way.  To put ourselves in their shoes.   To see through their eyes, so much so that we can see the strength in even that which to us seems wrong.   We must become like Hillel who put words of his opponent, Shami, before his own words.   Only then did he disagree.

When we are able, through love, to see others as whole people, to see  the strengths in others with whom we disagree and not speak bad about them, then our teshuvah will, as the Talmud says, bring healing to the whole world.