Ah, how to say this delicately

Anytime you donate to a charity, you are donating to a 'stranger'. I am not saying this to make you donate, since I can't do that, and don't want to do that...but, to say you can't donate to a 'stranger' is kind of odd.....to me....

I think it just makes more sense to post nothing, if you can't donate, you can't. That is your complete right. But, to mention the reason seems tacky to me, some how.