I developed a hatred for my MIL ever since the birth of my son. Nothing good comes out from her mouth as Chinese believes that we should say the negative to kids so they will grow to be the opposite of the meaning. For example telling the baby he is so skinny, he has no hair, he is naughty etc just so that they will turn out the opposite. I am not a believer of such myths. Ever since then (during the confinement period), I started to avoid her and have not greeted her or talk to her since. It has been 3 years but each time I think about the episode, I just feel very angry and my heart boils. How can I get pass myself so that I can start talking to her again just like before?

Since, you are a good woman, the anger that you are now letting dominate will only make you feel guilty. Your MIL, may be a traditional woman and believes in all that she does or may be not and just faking it, is how she is choosing to live her life. Do not give into the situation. Give yourself a new start. Throw the baggage that you are carrying from the past. You must have heard of Karma! So, it is her karma what she is doing and what you do is yours. I know, it is easy to give all this advice, and when the real situation comes, we all behave instinctively. But, if matters are fine with her now, forgive her and move on. And if she still continues the way she used to, you can have a word with her and tell her how you feel about the whole thing. You are anyway not talking to her, so speaking your heart would not change things for worse. The possibility that there be is only of her realising that she should not utter things that hurt you so badly. You are a good woman, and try to be a bigger one too, and forgive and start afresh. :)