You are suggesting that this kid is a traitor to the US. If a Jew suggested that Israel is worth its $3b annual stipend in response to criticism about Israel getting undeserved freebies, would you say he is basically a traitor? The kid merely said that South Korea pays some of the cost of the GI presence on the Korean peninsula, to correct Trump's statement (first made in 2011) that the US protects Korea for free, much as it protects Israel for free (moving to DEFCON 3 during the Yom Kippur War), and since the Camp David Accords, hands $3b a year to Israel.
Where did I say “traitor”?