I think the mother who breastfeeding openly in MRT without cover is already brain washed by those angmoh culture and thinking. Basically, she is saying it's my right to breastfeed in public anyhow I wish, my baby hunger is priority, it's her right to drink my milk anyway she wants. Her right is the most important thing in this world.
This type of thinking is dangerous in Singapore because we are multi-religious multi-racial society. If she do all these in angmoh countries it is actually very ok. But in Singapore please be considerate. Singapore don't even have nude beaches and gay sex is still criminal - this shows our society is still traditional, modest and conservative. She as the minority should respect the cultural views of the majority.
That is why Muslim women need to wear the tudung or hijab to cover our modesty. Don't wear very tight clothes and best if you can cover your hands and legs. This is to avoid the lustful gaze of men. I mean no matter what men claim they say, deep down inside they have lust, it is in our DNA.
In the Quran God tells the believing men and women to lower their gaze and to dress modestly. He (God) specifically addresses women when He asks them not to show off their adornment, except that which is apparent, and draw their veils over their bodies. (Quran 24:30-31)
So breastfeeding mum, yes, it is your right to feed your child - but if everyone take a me-first approach then Singapore very messy. Maybe u get off the train, go one quiet corner, after 15 mins can continue your journey.