There were a lot of innocent US Citizens kept from going where they wanted for a period of time, without any due process that I recall, when W closed the skies on 911. Yet officially we weren't even at war. (IMHO at the time we should and could have been in the time it took to declare it after Pearl Harbor. The unimaginative idiots in Congress who couldn't figure out how to define the "enemy" for a war declaration just needed to ask "Ways and Means" how to define them as a tax target!) At least we'd been constitutionally at war for a couple months before FDR's order. And those Nisei citizens did obtain judicial review. From FDR's order to SCOTUS ruling took 34 months. 41 months post-J6 and maybe today we'll get a SCOTUS ruling. I'm not sure but what some J6 defendants may have been held "pre-trial" without bail longer than 34 months. And although the internment conditions weren't free and ideal they were generally better than those the J6 folks have faced. Maybe the strongest connection between the Nisei and J6 is that in both cases you had Democrats questionably locking people up (Woodrow Wilson's law fare during WWI is another similar case) and Republicans (eventually Reagan in Nisei case) complaining about it.
There are two sides to every story. If Presidents did not have immunity and he had not died in office FDR could have faced a plethora of charges for his time in office.