I don't think your assessment of the situation is correct. I doubt the logistical challenges involved of kidnapping Snowden would give the US military and intel

I don't think your assessment of the situation is correct. I doubt the logistical challenges involved of kidnapping Snowden would give the US military and intelligence communities much pause if he were in Russia, Cuba, Ecuador, or anywhere else. Physical proximity to Guantanamo Bay and the US mainland are neither required nor particularly advantageous, these are global organizations with secret prisons in many places. What keeps him safe is that there is nothing to be gained in stealing him, he is a public figure, and another sovereign nation has granted him amnesty.