'@Nisse'_Hult I took OP's words "At the start of the previous century, Denmark wanted to preserve the culture in Greenland. This meant keeping out "modern corruption," such as alcohol, tobacco, etc." to mean that they had been introduced before, then subsequently banned by Denmark. I understand how that could also be taken to mean that alcohol etc had never been introduced and were banned as a preventative measure, although that seems unlikely that no Dane ever brought over a bottle of beer all the way up to world war 2.
One quick Google search later, and we have our answer: "In 1782, 41 years after Danish colonization of Greenland began, the colonial administration prohibited the sale or distribution of alcohol to Greenlanders. But loopholes soon developed, enabling Greenlandic employees of the Royal Greenland Trade Departman and Christian mission to obtain liquor... " https://heinonline.org/HOL/LandingPage?handle=hein.journals/condp13&div=34&id=&page=
Greenland has had contact with Europeans since the 10th century per Wikipedia, and most likely has had alcohol ever since then. It has certainly had alcohol since the 18th century, per the above. America became independent in 1776. Unless you are accusing us of time travel, the "blame America first" crowd is going to have to acknowledge that we have quite little to do with this. Certainly not "mostly due to America," which is what OP said.
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'@Nisse'_Hult I took OP's words "At the start of the previous century, Denmark wanted to preserve the culture in Greenland. This meant keeping out "modern corruption," such as alcohol, tobacco, etc." to mean that they had been introduced before, then subsequently banned by Denmark. I understand how that could also be taken to mean that alcohol etc had never been introduced and were banned as a preventative measure, although that seems unlikely that no Dane ever brought over a bottle of beer all the way up to world war 2.
One quick Google search later, and we have our answer: "In 1782, 41 years after Danish colonization of Greenland began, the colonial administration prohibited the sale or distribution of alcohol to Greenlanders. But loopholes soon developed, enabling Greenlandic employees of the Royal Greenland Trade Departman and Christian mission to obtain liquor... "
https://heinonline.org/HOL/LandingPage?handle=hein.journals/condp13&div=34&id=&page=
Greenland has had contact with Europeans since the 10th century per Wikipedia, and most likely has had alcohol ever since then. It has certainly had alcohol since the 18th century, per the above. America became independent in 1776. Unless you are accusing us of time travel, the "blame America first" crowd is going to have to acknowledge that we have quite little to do with this. Certainly not "mostly due to America," which is what OP said.