Mary Queen of Scots is called Bloody Mary for having 300 prodestants killed, She accused them of conspiring against her, but Elizabeth1 had far more blood on her hands in the name of national security but we don't call her Bloody Lizzy do we. Her father Henry 8th had thousands of English Catholics killed. Today history remembers him as an sob for but not for that reason. It was his brutal treatment of his wives that caused him to go down as a villain.
History is never simple and European history can be extra tough because its sometimes hard to distinguish fact from folklore.