You bet. With conviction.
He was born in Austria, raised in Austria and is a citizen of Austria. That makes him an Austrian.
When he applied for US citizenship in 1984, he was required to swear sole allegiance to our country. 15 years later he breached that oath and reacquired his Austrian citizenship. Yes he's an Austrian.
And this is what you call "breaching" his oath? You've just very carefully suggested that Governor Schwarzennegger is operating in the best interests of Austria. That his dual citizenship makes him more an "Austrian" than an American. I'm sure you knew you were "carefully" asserting this.
So, tell me. How long has "Austria" been benefitting financially and socially from CA Governor Schwarzenneger, himself? Does he send them money? Have spies he networks with over there? Is planning to "import" as many Austrians to CA as possible to take over CA?
Nah.
Here, at this adjuct, I think you'll just insert the usual about "mexican" immigrants, legal and/or illegal.