The BDS movement and the opposition to Israeli imperialism in overwhelmingly "white" countries, as is the same in any other country, are disproportionately nonwhite in overall demographics. Maybe not a majority or plurality, but it does not match overall demographics and includes a disproportionate amount of Muslims.
The "white" people who do support and partake in the BDS movement are not considered being apart of the dominant ethnic group in that country. The UK BDS scene is disproportionately Northern Celtic in cultural extraction who identify as such–Scots, Norf Ingerlanders, and working class immigrants from the Republic of Ireland–who then move to London or Southern England as migrants while their children get really involved in Leftwing politics. You will see fewer Wessex or Cornish supporters even outside of their homeland or within it, and you can hardly find an Essex or Shropshirean individual relative to their population.
The Spanish BDS scene is, most likely, primarily made up of uppity provincial people and Moroccans, the bedrock of the Spanish working class. Castillians are disproportionately not supporters nor are they active participants of the movement.
How are we intended to interpret the scare quotes around the word white in this post?