The Guardian reported on Sunday that an Australian writer was detained and deported by US authorities upon arrival at Los Angeles International Airport, allegedly due to his public commentary on pro-Palestine campus protests.

Alistair Kitchen, a 33-year-old from Melbourne, had traveled to the US last Thursday intending to visit friends in New York. However, during a layover in Los Angeles, he was held by US Customs and Border Protection (CBP) for 12 hours, questioned extensively, and eventually placed on a flight back to Australia. He landed in Melbourne on Saturday.

Kitchen believes his treatment was politically motivated. "The CBP explicitly said to me, the reason you have been detained is because of your writing on the Columbia student protests," he told The Guardian. He added that the interrogation included detailed inquiries into his opinions on the Palestinian conflict, including his "thoughts on Hamas".

"It was quite an in-depth probing of my views on the war," he said. "They asked me what I thought about the conflict in a very broad sense, about student protesters, what Israel should have done differently, and how I would resolve the conflict."

Deported dissent

Kitchen previously lived in New York for six years and was a master's student at Columbia University. During that time, he wrote about the Gaza solidarity encampment and published articles on his blog, Kitchen Counter. One piece focused on Mahmoud Khalil, a lead negotiator of the Columbia encampment who had been detained by US authorities. In that article, Kitchen described Khalil's arrest as one made "on utterly specious grounds by a neo-fascist state" aimed at "the deportation of dissent".

He pointed to a Trump-era executive order issued on January 30 that promised to cancel the student visas of pro-Palestine activists and enforce "law and order" against campus protesters.

Read more: 'I am a political prisoner': Mahmoud Khalil speaks out from detention

Kitchen said he had attempted to reduce the risk of being flagged by deleting some "sensitive political posts" and content from his blog and social media prior to his trip. But he believes US authorities had already connected his ESTA application to his writings using digital surveillance tools.

"Clearly, they had technology in their system which linked those posts to my Esta … a long time before I took them down," he said. "Because they knew all about the posts, and then interrogated me about the posts once I was there."

Border reprisal

According to Kitchen, he was called by name shortly after deplaning and taken for secondary processing. During questioning, he said he gave officers access to his phone, something he now regrets. "I had at that time, the wrong and false hope that once they realised I was, you know, just an Australian writer and not a threat to the US, that they would let me in," he said. "But then they took my phone away and began downloading it and searching it."

Kitchen said he felt "terrified of retribution and reprisal from the US government" for sharing his experience publicly, but believed it important to raise awareness. He encouraged other Australians facing similar treatment to avoid giving border agents access to their devices and to accept deportation immediately instead.

He has since restored the previously removed blog posts.

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During his deportation, Kitchen said his phone and passport were handed over to a Qantas flight attendant, and he was unable to access them until arriving back in Melbourne. Qantas confirmed to The Guardian that its crew received a sealed envelope from US customs containing the passenger's belongings, which were returned upon arrival. The airline declined further comment.