This is who the Nazi's persecuted, with the help of the Vatican. If you see these groups being attacked today…think Nazis.
Single triangles
Red triangle – political prisoners: social democrats, liberals, socialists, communists and anarchists; rescuers of Jews; trade unionists; and Freemasons.
Green triangle – convicts and criminals (often working as kapos).
Blue triangle – foreign forced laborers and emigrants. This category included apatrides, French refugees from Francoist Spain, whose citizenship was deprived and emigrants to countries which were occupied by Nazi Germany or were under German sphere of influence.[2]
Purple triangle – primarily Jehovah's Witnesses (over 99%) as well as members of other small pacifist religious groups.[notes 1]
Pink triangle – primarily homosexual men and those identified as such (e.g., bisexual men and trans women)[3][4][5] as well as sexual offenders including rapists, pedophiles and zoophiles.[6]
Black triangle – people who were deemed asocial elements (asozial) and work-shy (arbeitsscheu), including the following:
Roma and Sinti (Gypsies). They wore the black triangle with a Z notation (for Zigeuner, meaning Gypsy) to the right of the triangle's point.[7] Male Romani were later assigned a brown triangle. Female Romani were still deemed asocials as they were stereotyped as petty criminals (prostitutes, kidnappers and fortune tellers).
Mentally ill and mentally disabled. Their triangles were inscribed with the word Blöd, meaning stupid.[8]
Alcoholics and drug addicts.
Vagrants and beggars.
Pacifists and conscription resisters.
Prostitutes.[9][10]
Lesbians.[11]
Brown triangle – Romani males.
Uninverted red triangle – an enemy POW (Sonderhäftling, meaning special detainee), a spy or traitor (Aktionshäftling, meaning activities detainee), or a military deserter or criminal (Wehrmachtsangehöriger, meaning service member).
https://en.wikipedia.org/wiki/Nazi_concentration_camp_badge