Actually I think the question has been ansered by the Rosenbergs.
They claimed they believed that no single nation should have "the bomb" because it would lead eventually to a global superpower. The people were Jewish and survived Hitler and aruably were taking a "humanity first" position. We will never know if they were right because now more than one nation does have nukes.....but can we honestly say that no US leader would have ever used our sole possession of nukes to go for world domination? We already have a president in recent times willing to lie to launch a war (Poland anyone?).
Anyone looking at an interesting debate about what a traitor is might want to consider the case of Verner Von Braun, the famous rocket scientist the US spirited out of Nazi Germany at the end of WWII. Many Jews and many Brits believed this man to be a war criminal...the rocket factory at Piedamonde was staffed with Jewish slaves and the horrors the V-1 and V-2 rockets brought to England were legendary (a good think he didnt have nuclear warheads on them). We brought this man back to the USA because he was absolutely brilliant in his field and without him it is unlikely we would have landed on the moon.....but again there are those who would not give him a pass like the US government did.
It is true that religion may place a person in a position of religion first and country second, especially in the light of history showing a government can and has turned on various religious groups...would you blame a Jew for placing his religion ahead of loyalty to Germany in the 1930's and 1940's for example? Even today, Israel is a nation not much bigger than New Jersey surrounded on all sides by enemies....its hard to imagine anyone loyal to Israel not being a bit paranoid or concerned about its future. Of course I personally believe that if Israel was wiped out the Jewish faith would continue.....I consider the attachment to land to be a serious problem given that religion is supposed to be about the next world, not this one.
At the end if the day I would say a US citizen selling or giviong any kind of sensative classified information to another nation is a traitor hands down. If he did it for the money it doesnt matter who he sold it to and if he did it out of loyalty to another nation or faith then he had no business signing his security contracts because he has a different agenda than the entity he is working for. There should be no double standard because the buyer was Israel.
And back to the Rosenbergs. If you believe you have a higher reason which makes you sell out, you then step into a new place. A nazi soldier who would refuse to load Jews into the gas chamber would be there too.....if you go against your nation because it is against your humanity then you know what you are doing and you know its right. Some do consider the Rosenbergs traitors-others do not because of their reasons. We can have some good debate about the Rosenbergs....are we all here today because they prevented a nuclear conquest by a single nation? Is the US really immune from falling into the situation they feared (remember Germany was a democracy when Hitler came into power).