Khloe Kardashian Defends Brother Rob Against Instagram Attacks -- See What She Said!

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Khloe Kardashian has got her brother's back!

Rob Kardashian posted an inspiring video of Malcolm X to his Instagram, where the civil rights leader says, "I live like a man who is dead already," continuing, "I have no fear whatsoever of anybody or anything."

WATCH: Rob Kardashian Steps Out for Workout, Runs Into Kylie Jenner and Tyga

While Rob offered the video with only two exclamation points of the captions, some commenters assumed the Keeping Up With The Kardashians star was comparing himself to the deceased black leader. That's when Khloe stepped in to take those fans to task.

"He is not comparing himself you judgmental f*ck," Khloe replied to one commenter. "Where did he say he was?!?! He's simply admiring another man's wisdom, strength and courage...Can't one admire another without the stones being thrown. Chill out. Get off my brothers page."

WATCH: Kris Jenner Worries Rob Kardashian Is 'Going to Die,' Says He's Gained 100 Pounds in the Last Year

The message must have hit home with the commenter, as a followup comment from Khloe to the same person said, "Happy to hear that! He gets criticized for being too private and then when he decides to get back on social media he gets attacked."

"Damned if you do and damned if you don't. Let's uplift one another and not assume. Let's all root for Rob," she added.

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Wow, that's one great sister!

"Khloe is very protective when it comes to Rob," a source close to Khloe tells ET. "Rob was there for Khloe when she was going through her divorce with Lamar. She couldn’t have done it without Rob. So now she feels like she needs to be there for him when he is going through a hard time."

"Rob is very sensitive when people make fun of his weight," the source continues. "When photos of Rob leaving Kim and Kanye’s wedding in Europe came out, the media destroyed him for his weight…and that was really tough for him. Everyone feels like Rob needs some tough love to get back into the swing of things, but Khloe always stands by him, and is never hard on him."

Rob has been stepping out in public and on social media slightly more as of late, and last week posted a noticeably slimmer photo of himself to Instagram.

WATCH: Kendall Jenner Posts Old Video of Laughing Rob Kardashian

Rob has been focusing on his health and working out with sister, Kim Kardashian. In late August, the 34-year-old reality star tweeted, "Rise & Grind! Workout time!!!!! With @robkardashian"

WATCH: Kim Kardashian Finally Explains Why Rob Left Her Wedding

As of right now, Rob is living with Khloe in her Calabasas, California home, which she seems to be enjoying.

"Rob lives with me now and I wouldn't have it any other way. I love having him with me," she told Complex magazine. "He's going through a hard time now and it's behind gates. With this crazy lifestyle you have to think of places where you can still have your freedom."