Trump does not have a literal, personal “hate” story on record about Rob Reiner, but the hostility between them grew out of years of Reiner’s loud, consistent criticism of Trump and Trump’s habit of hitting back hard at critics, especially in Hollywood.

Quick Scoop

  • Rob Reiner spent years calling Trump unfit for office and dangerous to democracy, which put him among Trump’s most visible Hollywood critics.
  • Trump, in turn, mocked Reiner as “deranged,” claimed he suffered from “Trump Derangement Syndrome,” and even used that language again right after Reiner was killed in 2025, drawing heavy backlash.
  • So the “hate” is less about one single incident and more about a long-running, very public feud: Reiner attacked Trump’s legitimacy and character, and Trump responded by belittling Reiner and his politics in harsh, personal terms.

How the feud started

  • Rob Reiner has been a lifelong liberal activist and Democrat who saw Trump as a unique threat to American institutions, and he said so constantly in interviews and on social media.
  • As early as Trump’s first term, Reiner called him “mentally unfit,” “unqualified,” and accused him of undermining democracy and being compromised by Russia.

Reiner once said Trump was “the single most unqualified human being to ever assume the presidency of the United States,” and that he had “no interest” in how government works.

Russia, treason, and “deranged” talk

  • In 2017, Reiner helped launch the Committee to Investigate Russia, a project focused on Russian interference and possible ties to Trump’s circle, something Trump consistently dismissed as a hoax.
  • Reiner went further than many critics: he talked about Trump committing “treason” over decisions like pulling troops from Syria and for his closeness to Vladimir Putin, arguing Trump was “aiding and abetting the enemy.”

These kinds of statements framed Trump not just as wrong but as betraying the country, which is the kind of accusation Trump tends to answer with personal counterattacks.

Why Trump hits Reiner so hard

  • Trump routinely labels his loudest critics as “deranged,” “sick,” or obsessed with him, and he slotted Reiner into that pattern, saying Reiner had a “mind-crippling disease known as Trump Derangement Syndrome.”
  • He has said he “wasn’t a fan of [Reiner] at all,” and publicly described him as a “deranged person” who was “very bad for our country” because of his role in pushing Russia-related accusations.

From Trump’s point of view, Reiner symbolized the Hollywood–liberal camp that, in his narrative, never accepted his presidency and tried to destroy him with investigations and media pressure.

The 2025 murder and why the feud blew up again

  • When Reiner and his wife Michele were murdered in 2025, Trump posted that Reiner’s death was “reportedly due to the anger he caused others” through “Trump Derangement Syndrome,” implying Reiner’s own obsession with Trump somehow led to his killing.
  • He repeated that framing at the White House, calling Reiner “deranged” and insisting he was “very detrimental to our nation,” even as the deaths were still under investigation, which many politicians and commentators called cruel and indecent.

This episode made the long-running animosity feel even more personal and vindictive, and it cemented the sense—especially in online discussions—that Trump “hated” Reiner.

Different ways people interpret it

  • Some Trump supporters say Trump just fights back, arguing that if Reiner spent years calling him a traitor and unfit, Trump is simply responding in kind, not expressing deep personal hatred.
  • Critics see Trump’s comments—especially right after Reiner’s death—as proof of a cruel streak: they argue he dehumanizes enemies and uses any moment, even a murder, to score points against someone who dared to oppose him.

So when people ask “why does Trump hate Rob Reiner,” the answer is really: Reiner spent years portraying Trump as dangerous and illegitimate, and Trump, who defines himself in opposition to outspoken critics, turned Reiner into one of his favorite targets and never dropped the grudge.

TL;DR: Rob Reiner attacked Trump for years as unfit, dangerous, and even treasonous; Trump responded by branding Reiner “deranged,” obsessed, and “very bad for our country,” and he doubled down on that language even after Reiner’s murder, which is why the hostility now feels like outright “hate” to many observers.

Information gathered from public forums or data available on the internet and portrayed here.