He was arrested his involvement in organising a strike action and for his writings in support of anarchism and Cuban independence, which together informed his developing perspective of Canarian nationalism.

[1] When the Cuban War of Independence broke out, Delgado went to Cuba to support the liberation movement, but was soon forced to leave after he was accused of bombing a Spanish military base in Havana.

[3] After the establishment of a United States Military Government in Cuba, Delgado began to fear a US invasion of the Canary Islands, which led him to temper his criticisms of Spain.

Back on his home island of Tenerife, he established a trade union and an autonomist political party, in collaboration with anarchists and liberals.

[4] Aided by the republican politician Nicolás Estévanez and the anarchist activist Fermín Salvochea, Delgado returned to Tenerife, where he began working for the Canarian left-wing newspaper Vacaguaré.

Delgado's nationalism was an anti-colonial rather than ethnonationalist ideology, eschewing the idea of a unified ethnicity and instead centreing the shared class conditions of Canarian people.

He viewed Canarian identity within the context of Hispanidad, in which Spaniards had an "illegitimate pretension to rule all Hispanic territories", including the Canary Islands and Cuba.

[9] Delgado's synthesis of anarchism and Canarian nationalism was inspired by Mikhail Bakunin, who advocated for social revolution while also supporting anti-imperialism.