I, for example, would never betray a friend. You can only betray a friend, a close relative, or someone you care about.
But I can't betray my homeland; it's not possible because I don't feel as close to it as I do to a friend.
You've been offered a choice between a BMW X5 and a Lada 2101.
If you choose the BMW, you're a traitor or a defector.
And besides, we're not choosing a product; we're choosing between friends, relatives... against temptations...