I talked about several traitors not just those who were executed . Your website is interesting but dubious at best.
They left out the Rosenbergs (Espionage = treason)
https://en.wikipedia.org/wiki/Julius_and_Ethel_Rosenberg
espionage is not treason...treason is narrowly defined by the constitution.
https://www.nbcnews.com/think/opinion/americans-have-forgotten-what-treason-actually-means-how-it-can-ncna848651