The content may be sourced for some countries but not for all therefore it is inappropriate for the infobox and for the lead to present it as if it is specifically aimed at communism generally What is common to the day in all countries that mark the day is totalitarianism and Stalinism ergo I tweaked the lead to reflect commonality As noted to you you re welcome to add communism to nation states who have included communism where it is sourced You are not welcome to misrepresent the principle common features between the nation states that have designated it as a day of remembrance This is an encyclopaedic source not a POV pushing source