The tweet includes an image of Thunberg wearing her trademark pigtails alongside a Nazi-era poster featuring a young girl with similar features and hair.
D'Souza goes on to claim that the progressive left's adoption of the Fridays for Future climate change movement initiator could be compared to indoctrination methods used by Nazi Germany's Propaganda Minister Joseph Goebbels.
"Children—notably Nordic white girls with braids and red cheeks—were often used in Nazi propaganda," D'Souza wrote in his tweet. "An old Goebbels technique! Looks like today’s progressive Left is still learning its game from an earlier Left in the 1930s".
Children—notably Nordic white girls with braids and red cheeks—were often used in Nazi propaganda. An old Goebbels technique! Looks like today’s progressive Left is still learning its game from an earlier Left in the 1930s pic.twitter.com/E4q2KZ526s— Dinesh D'Souza (@DineshDSouza) September 22, 2019
The tweet received more than 25,000 likes and 10,000 retweets.
Alongside much support, D'Souza has also been criticized for his tweet.
Emma Vigelend, corresponded and producer for progressive left-wing American news and commentary program The Young Turks, had posted a harsh-worded tweet going against D'Souza, calling him a "pathetic felon."
"Targeted harassment of a child from a pathetic felon, who is clinging to the paper-thin relevancy he created for himself on the back of systemic racism," Vigelend wrote in her tweet. "Translation: F*** Dinesh D’Souza. Greta Thunberg is the most beautiful soul this earth can conjure."
The 16-year-old Thunberg started making waves around the world in August 2018, when she decided to not attend school and protest by sitting outside the Swedish parliament every day for three weeks during school hours.
This act of protest had received world-wide media coverage and thousands of people joined Thunberg's protest, further raising awareness to climate change.
D'Souza was charged in 2014 with making illegal campaign contributions to the New York Senate campaign of Wendy Long and causing false statements to be made to the Federal Election Commission.
President Trump granted D'Souza a full pardon in June 2018, claiming on Twitter that D'Souza "was treated very unfairly by our government."