It does not matter how much money they have.
If they did donate, you would have no way of knowing. (and they could have)
If they didn't, you don't know, either!
You have no idea that they do not support one of those non profits or churches that helped, so helped indirectly.
And its none of your business if they did.!
I have an uncle who is quite wealthy. He had $15 to his name when he was kicked out of the house at 18.
He learned a trade. he saved almost every penny, he lived extremely frugally. And now he is wealthy because of it.
He does not give to every call to give money flood, tornado victims, etc.
If he knew someone PERSONALLY who was going through that, he would be the first one to help to
rebuild their porch, to drive them to the store when their car was repossessed if they were laid off, the first person to offer to put a good word in at a company
or to anonymously leave a bag of groceries on the porch.
But he would never give money to "groups" except a twice yearly donation to a local food pantry and shelter that was directly within 15 miles of his house.
As a rule -- he never "impulse donates" - ie, he ignores emotional pleas and stays on track with his normal donations.
In a time of crisis you would expect at least a phone call, especially from family.
But it wasn't YOUR crisis. You were not in the ICU. Your house didn't burn down. If you were not a part of the union and you were in IT and you had a crisis at work where your company was being taken over and you had a security breach, would you expect a phone call? Probably not.
I think you need to review your priorities and not lose your family over this. So you punished small children or kids who are obvlivious to the situation, elderly relatives, siblings, etc, because you felt that a couple wealthy relatives should give money and be vocal about it?