(CNN) Some think Rep. Alexandria Ocasio-Cortez went too far when she compared the detention of immigrants at the border to being put in "concentration camps" earlier this week.
But actor and activist George Takei, who was sent to a Japanese-American internment camp during World War II with his family, backed up the New York Democrat's characterization.
"I know what concentration camps are," Takei wrote on Twitter this Tuesday. "I was inside two of them, in America. And yes, we are operating such camps again."
This is not the first time Takei has spoken out against the Trump administration's immigration policies.
When news of the President's "zero-tolerance" policy -- which separated thousands of children from their parents -- first broke last year, Takei called the border situation "worse" than the circumstances in which he was placed in a Japanese-American internment camp in the 1940s.
"At least during the internment, when I was just 5 years old, I was not taken from my parents," he wrote in an op-ed for Foreign Policy magazine. "At least during the internment, my parents were able to place themselves between the horror of what we were facing and my own childish understanding of our circumstances."
Earlier on Tuesday, Ocasio-Cortez had invited controversy with a post comparing the concentration camps and current US border detentions.
"This administration has established concentration camps on the southern border of the United States for immigrants, where they are being brutalized with dehumanizing conditions and dying," the congresswoman wrote.
The term "concentration camps" is commonly associated with Nazi death camps, and Ocasio-Cortez's comments instantly sparked a backlash.
Republican Rep. Liz Cheney of Wyoming accused the New York Democrat of being ignorant of history and disrespecting the Jews who died during the Holocaust.
In response, Ocasio-Cortez tweeted, "Hey Rep. Cheney, since you're so eager to 'educate me,' I'm curious: What do YOU call building mass camps of people being detained without a trial? How would you dress up DHS's mass separation of thousands children at the border from their parents?"
Cheney replied with a link to Holocaust survivor Elie Wiesel's "Night" and urged her to read the book.
Takei defended Ocasio-Cortez amid the criticism.
"It is sad that there is so much outrage vented toward @AOC and @taylorswift13 for speaking out on behalf of others, when that same energy and passion could be directed at those who made it necessary to speak out in the first place. Get your priorities right, folks," he tweeted Thursday.