Hinkle was recently featured by the NYT as the face of the rising anti-imperialist and pro-Palestinian movements.
Today, he says he is a Stalinist and a Maoist who was expelled from the Communist Party of the United States. (Roberta Wood, a party leader in Chicago, said he subscribed to the newsletter but had never joined the party and did not reflect its values.) He once supported Bernie Sanders, but now praises Donald Trump.
He is, he wrote last year, an “American PATRIOT, GOD fearing, Pro-FAMILY, Marxist Leninist, Pro-PALESTINE, RUSSIA & CHINA, Anti-DEEP STATE, Anti-IMPERIALIST, Anti-WOKE, Pro-GROWTH, ANTI-MONOPOLY, Pro-GUN, Pro-FOSSIL FUEL.”
Now liberals everywhere will continue to associate those ideologies with uncritical support for Putin and anti-LGBT views. 
I will only say that it is hard to tell from that photo that that is actually Jackson Hinkle, but this is extremely on the nose since San Onofre is really close to a marine base.
It's gotta be him, he is also known for being a surfer. Also, I looked at his face, and that's him.
This blog post by ~~the army colonel~~ his girlfriend(?) was linked in the NYT article and it identifies him as Hinkle.
Nice, Tulsi Gabbard was there as well, along with the marine base being prominently in the background. Thanks!