hating sins done by people
The Prophet said: If you see something wrong being done, fix it with your hand. If you can’t, then speak up about it. If you can’t do that either, then at least reject it in your heart.
That’s the lowest level of faith.
Then he said again: If someone doesn’t even reject the wrong in their heart, they have no faith left, not even as small as a mustard seed.
It’s not about acting harsh. It’s about not being okay with something clearly wrong. Even if you say nothing, your heart should still feel it.
(from Syajaratul Ma‘arif, Syaikh al-‘Izz bin Abdus Salam)