I have no words to those who attempted to define this as discrimination and compared it to racism, just abhorrent.
As for you OP, you can't like this friend much as you've not even once asked people to stop the nasty words being spoken about her and defend her, despite you claiming you also understand her point. Some friend you are..
If you had some decency, perhaps ask this thread to be deleted, your friend has been unfairly called disgusting names and she has not even done anything wrong.
I'm failing to understand your stance, surely you knew life would change when you had children? Unfortunately, you cannot attend everything and no one is obligated to socialise with your children either. Some times having your children present is more than welcome, and others not so much. There will be times where your children can attend, yet you still will not be able to go, and times where they cannot and if you cannot accommodate alternative arrangements, it is certainly fine to decline, you would not be wrong in doing so.
This entire thing has become more than it ever was and it is just shocking to have read some of the arrogant and ignorant posts here.
Imagine if your friend wrote a thread about you over such a non-issue and they allowed you to be verbally abused online over it.