Any person, including a minor, can renounce their US citizenship when expatriate themselves.
7 FAM EXHIBIT 1292
A SAMPLE LETTER TO ACCOMPANY CLN FOR MINOR RENUNCIANTS
Post Letterhead Date
Dear (Name):
Every U.S. Citizen has the right to renounce voluntarily and intentionally his or her citizenship, as you have done. Because this is a very serious decision with consequences that may not have been apparent to you at the time, the law gives persons like yourself who renounced under the age of 18 an opportunity to reevaluate your decision when you reach the age of 18.
Section 351(b) of the Immigration and Nationality Act (8 U.S. Code 1483) allows you to reclaim your U.S. citizenship within 6 months ...
The rest of the sample letter can reviewed on the internet after a simple search.
Barry Soetoro recieved such a letter and would not have been allowed to become an Indonesian National if he had not received his CLN from the US.
You assume he formally renounced his US citizenship (before the age of 10!). Not very likely, is it?
Nor have you proof he became an Indonesian citizen. Nor would the Supreme Court uphold the idea that a child 10 years or less could effectively renounce his citizenship in the USA.
Further, you have no proof he returned to the US at the age of 10 as an Indonesian with an Indonesian passport. Even if he had, by living in the US from age 10 on, he would have reclaimed his US citizenship - see the case in the thread I posted to you...