I think most charities are tax deductible only in their own countries. Oxford's cross country deductiblity is more the exception than the rule. To be specific, I'll not get a tax deduction in India if I contributed to fhi. But if I swap with an englishman who wanted to contribute to the ramakrishna mission or child relief and you (indian charities) then we both benefit.

I agree on potential regulatory issues. That's why I wanted more opinions.