@Suiseiseki @EUCommission

Those were mostly casualties from warfare, if I'm not mistaken. I mean the Russians and Poles, which constitute the vast majority of the 11 million you've mentioned. This is different from people being targeted by the ideology of ethnic "cleansing."

The post did mention hundreds of thousands of Roma, who were also targeted by that ideology. Serbs and Slovenes I don't know much about; perhaps they should have been mentioned as well, if they were targeted for their ethnicity. Likewise with the disabled, and homosexuals, who although not an ethnicity were seen as "defective" people. If your numbers are correct, then I'm not sure why Roma get an explicit mention but other groups don't.

Freemasons, Spanish Republicans, and Jehovah's Witnesses would fall under political persecution I suppose, which is not directly related to the ideology of "cleansing" so I would understand them not being included as part of Holocaust remembrance. That being said, there's an argument to be made that "Holocaust" (or "Shoah" in Hebrew) specifically refers to the persecution of the Jews, and that the inclusion of Roma already expands the aim of Holocaust Remembrance Day. If we want to raise awareness of all Nazi atrocities, then perhaps it would be most accurate to speak of:

Remembering the six million Jewish victims of the Holocaust, as well as all other victims of Nazi atrocities, including the genocide of Romani people and Slavic people such as the Serbs and Slovenes, the systematic murdering of disabled people and gay and bisexual men, the killing of millions of Russian and Polish prisoners of war, and the political and religious persecution of a variety of groups such as the Freemasons, Spanish Republicans, and Jehovah's Witnesses.