Because, you know. Priorities. The Marine was clearly there as a spy. Biden does not get any points with a military he is working to demoralize and destroy. Your government does not give a fuck about the people they send off to die for THEIR interests.
Joe Biden and the entirety of Washington know that they are hated by the majority of the people of this country. The only people they want to be liked by, are that minority who thinks they speak over and above the majority. Fuck Joe Biden.