I can reword your statement to use Spanish and Peru. It sounds just as weird:
I see the spread of the Spanish language a step in the Peruvianization of the world, which is a shame.
Iceland (I assume) imports far more American culture than British. They simply dominate many forms of art (TV, movies, games). So while you are right that America is not the birthplace of English, English is the medium in which American culture spreads.
Of course, but it's not relevent.
> I see the spread of the Spanish language a step in the Peruvianization of the world, which is a shame.
Peru isn't driver of Spanish-speaking culture the way the US is the driver of English-speaking culture.
TV shows, music, film, technology news and discussion websites, …. Most are US-made, and go hand in hand with the spread of the English language. An English lerner in ${X} will watch Breaking Bad, House of Cards, Spiderman, … (all in English, maybe with suptitles), will listen to Rhianna, Eminem, …, and will talk about "Performance", "Data Center" or use other English loanwords (if working with technology at least). It's obvious to me enough exposure to US culture does lead to a US way of thinking.
People in China haven't been aggressively learning English the last ~30 years primarily so they can do business with New Zealand. English become the global language of commerce because the US took over nearly half of the global economy, and over half of its manufacturing, immediately after WW2.
It's pretty simple: the British started that fire, then their empire declined. The US picked up their torch and made the fire a lot bigger with the wide-spread globalization we see today coinciding with the US becoming the sole superpower post WW2 (ie produced a perfect storm for English spreading globally).
There's a reason why people haven't been aggressively learning Chinese despite it being the language of the world's #2 economic power, and that's because all the boots on the ground work to set up civil services, education systems and trade networks and associate their language with prestige and power had already been done by colonialists speaking other languages.