The thing is, Trump himself posted it and it was also on the White House site. He surrounds himself with ignorant people who want power at any cost. I don't think he has the mental capacity to comprehend how terrible this image is.
Regarding the Executive Order about martial law, I'm in the US and I am worried. It was signed on April 28th and is called 'Strengthening and Unleashing America's Law Enforcement to pursue Criminals and Protect Innocent Citizens'. Yeah, right.
"My Administration will work to ensure that law enforcement officers across America focus on ending crime, not pursuing harmful, illegal race- and sex-based “equity” policies.
The result will be a law-abiding society in which tenacious law enforcement officers protect the innocent, violations of law are not tolerated, and American communities are safely enjoyed by all their citizens again."
Section 4 says that with 90 days "the Attorney general and Sec of Defense, ...Sec of Homeland Security...shall increase the provision of excess military and national security assets in local jurisdictions to assist State and local law enforcement."
He focuses on punishing DEI initiatives as a priority in there, too. I don't feel that I will be safely enjoying my community if the military are ready to stomp in.