Why would Obama support Biden?

Barack Hussein Obama in a 12 16 2019 private event in Singapore* attended by thousands, proudly announced:
“If you look at the world and look at the problems, it’s usually old people, usually old men, not getting out of the way,”
* By the way, he lived in Indonesia as a child raised in the Muslim faith, under the name Barry Soetoro (according to records from his Indonesian elementary school). This was long before he joined Rev. Wright’s “God damn America” church. I thought that Muslims could kill anyone who switched to another religion. Why would he risk going there?
And the SSN he used later in life was issued from Connecticut while he was a 9 year old living in Indonesia, who had never been to Connecticut and was not using the Obama name. How did he do that?
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