A member of the education advisory board that oversees Marjory Stoneman Douglas High School is under fire for tweeting a meme comparing Parkland survivor David Hogg to a Nazi.

Wayne Alder, a partner at a Boca Raton law firm, reportedly tweeted an image in March of Hogg speaking at March for Our Lives with a raised fist above his head. “Parkland. Here is your future. I won’t be wearing the Broward Brown Shirt,” Alder wrote, referring to the uniforms worn in Nazi Germany, according to screen shots taken by the Miami New Times. Alder also retweeted an imagine of Hogg with the “March for Our Lives” sign on the podium edited to show a swastika.

The two posts, shared on the same day that hundreds of thousands of teenagers and their allies poured into Washington to protest gun violence in schools, were among several tweets where Alder mocked Hogg.

“I’m from Parkland,” Alder wrote in another tweet one week later. “This is what happens when a town decides to back one political party, one political voice. The tyranny of one voice that is David Hogg.”

Alder denied posting about Hogg, but he didn’t deny that the Twitter account belonged to him. After confronting him with screenshots, The New Times noted that Alder changed the settings on his Twitter account to “private.” Alder’s account has since been deleted.

Alder joins a right-wing smear campaign against Hogg that's ratcheted up as he becomes an increasingly prominent voice in the gun control debate.

Other recent examples have included Fox News’ Laura Ingraham, who, in March used her late-night TV slot to mock Hogg for not getting into all the colleges he applied to. In response, Hogg called on advertisers to boycott her show. Some companies, including TripAdvisor and Blue Apron, obliged.

Broadcaster Jamie Allman was fired from his Sinclair shows earlier this week for tweeting that he was “getting ready to ram a hot poker up David Hogg’s ass.” Earlier this week, a police officer from North Miami Beach was put on desk duty for suggesting on Facebook that the February massacre was a hoax, and that the student activists were “crisis actors.”

Neither Alder nor the Parkland Education Advisory Board responded to VICE News’ request for comment.