Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE mocked the protesters who gathered to oppose his father in London on Friday, labeling them “batshit crazy.”

“If this is the ‘resistance’ I’m really glad I’m on the non-batshit crazy side,” Trump Jr. tweeted.

If this is the “resistance” I’m really glad I’m on the non-batshit crazy side. https://t.co/V9cLxj2R0Q — Donald Trump Jr. (@DonaldJTrumpJr) July 13, 2018

He was responding to an image of protesters gathered in front of a 20-foot-tall “Trump baby blimp,” which flew over the protests in London.

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Other Twitter users also knocked the protests, largely over the size and use of the "baby blimp" designed to look like President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE.

sort of the perfect expectations v. reality metaphor for #TheResistance pic.twitter.com/LIb7WFWHsM — Alex Griswold (@HashtagGriswold) July 13, 2018

Headlines vs reality pic.twitter.com/LInT4vKHSW — Elliott Schwartz (@elliosch) July 13, 2018

Roughly 250,000 people turned out for the mass demonstrations in London. Trump was in the city as part of a trip to the United Kingdom, but his schedule largely kept him out of London.

Trump said in an interview with the British tabloid The Sun on Thursday that the protests in London made him feel "unwelcome."

“I used to love London as a city,” Trump said. “I haven’t been there in a long time. But when they make you feel unwelcome, why would I stay there?”