"Hiding" money abroad and not reporting the income on your tax returns is fraud. "Depositing" money abroad and reporting the income on your tax returns is not. Do you have any evidence that any money was "hidden?"
Until Romney releases his tax returns, we'll never know, will we? He's obviously hiding
something though; that much is obvious from his continuing stubborn obfuscations on the subject.
But what is indisputable is that Romney has been exploiting loopholes to avoid paying the taxes he otherwise
should. Which, while legal, is of course unethical, unfair, and yes, un-American.