Donald Trump Jr. compared the border wall project between his father and Mexico and Mexico to a zoo fence Tuesday night, causing a brutal reaction on social media users who thought he was comparing the immigrants to zoo animals.

"Do you know why you can spend a day at the zoo?" Wrote President Donald Trump's son in an Instagram post that has since been removed. "Because the walls work."

Seinfeld's director, Larry Charles, tweeted that Trump's eldest son was "so blinded by his own pride that he can not see that once @realDonaldTrump has fallen, he will no longer be around. A convict serving a sentence for treason, in a cage, behind a wall ".

Emily Jane Fox of Vanity Fair wrote: "Immigrants as Caged Animals, the First Son".

A spokesman for Trump Jr. told Hill that the message highlighted the danger and violence associated with unsecured borders and that any other insinuation distracted "Don's view that walls are synonymous with security".

In 2016, Trump Jr. sparked an uproar among critics when he turned to Twitter to compare Syrian refugees to a bowl of poisoned bowling games.

The latest message was issued shortly after Trump said Tuesday evening in a speech at the Oval Office that the country was facing a "crisis" on the southern border of the country, about undocumented immigrants. In his speech, Trump proposed to erect steel slats to protect the border.

Young Trump's Instagram post prompted this comment on Twitter: "In fact, I can not enjoy a day at the zoo at the moment.The national zoo is currently closed because of the #TrumpShutdown"

Trump Jr. has already made controversial analogies on social media, as when he compared Syrian refugees to a bowl of Skittles in which some of the sweets are poisoned.