Mrs D, I hadn't seen your post but I have gone back now and read it.
I think if it was 5 minutes then you're probably right to have carried on but on balance, if it were going to be any longer than that, if I had a 2-3 week old baby then yes I would have put down the basket, put the brake on the buggy, told the 5yo to be good and picked him up.
I can't bear to hear a baby crying. It's all they have got - they need us to help them out. It upsets me to think that they think I'm not listening, and making their throat sore by crying.
If you had fed so recently then maybe it was wind or something.
I have as I said, carried a newborn while pushing a pram simply because he was upset to be lying down, and it wasn't easy but imo it was necessary.
It isn't judgment of the parent. It's really not that at all and I feel for the parent and their embarrassment.
It's a physical pain from hearing a crying baby. It actually hurts so much to hear it.
When I comment to people whose babies are crying, it isn't me being friendly, it's me hinting that they ought to pick them up. Yes sit down on a wall, sit on a shop display, or on the ground - stop in an aisle, do whatever it takes - I'd willingly help - but just do whatever it takes to stop them crying.
I don't know if I am weird in feeling like this. I'm sorry if it is wrong somehow. But it absolutely isn't judgmental thinking, it's just a very strong instinct I suppose to respond to the baby.