This was the right move to make- it's hard to verify whether the money is going to, for example, neo-fascist paramilitary groups, which are rampant in western Ukraine at the moment. I personally think that donating to groups providing aid and medical care to civilians and refugees -the red cross and so forth- is a much more effective way to help actual suffering people.
Adding more weapons to an ongoing conflict is an extraordinarily difficult thing to do in a helpful way, even with the best of intentions, as the history of western intervention in foreign conflicts has vividly demonstrated. You think that the CIA can't seem to do it, despite decades of attempts and the best intelligence apparatus in the world- but you can? They gave guns to the Taliban, to Saddam Hussein, and on and on- how did that turn out? Do you really know who you're giving guns to?
And after the conflict is over, the guns don't go away- they just change hands, and what will they be used for then? It's kind of dismaying to see how many people here have still not learned this lesson.
Patreon did the right thing. They are the adults in the room.