I quarrel with the choice of that word.
Endemic assumes something localised, unique - and naturally occurring.
Violence towards women (or any form of family violence) is not localised, unique to this country or natural.
Anger's unquestionably a natural response but how we handle it is surely a learned behaviour. There's nothing excusably innate about it.
I believe the word White Ribbon was searching for was "epidemic". Regrettably that's not in question. This country is appreciably over-represented by men who bash and verbally abuse females. One in three women experience violence from a partner in their lifetime, while 14 are killed each year by a member of their own family.
It may be the wrong use of the word, but it's an understandable error. While cowardice and thuggery are not symptomatic of simply being born here, "endemic" is sadly no longer synonymous only with this country's national treasures.