The same reason people here call themselves "Albert Speer" or use a Nazi officer as their avatar, I suppose.
Too bad you weren't playing Alpha Centauri, or I could have loaned you my Zionist custom faction. See how he likes having his ass handed to him on a plate by the Zionist Defence Forces.
And I happen to know that Jews do own at WarCraft.
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Everything changes, but nothing is truly lost.