Because the claims of Spanish colonialists trump the claims of British colonialists?
No Venezuelans live in the Essequibo, or have ever lived there.
While a referendum in Venezuela showed almost unanimous support for annexing the territories, they did not hold or consider a referendum in Guyana, or even the Essequibo district. What do the “Essequibans” want? Who cares. But I suspect they would not choose rule by Caracas. Heck, seven million Venezuelans have fled rule by Caracas.
Because the claims of Spanish colonialists trump the claims of British colonialists?
and there it is...