Lenin Gutierrez, 24, was operating his usual change at a San Diego Starbucks on a Monday morning when a female - who was not putting on a mask - walked in and attempted to put an buy, he informed CNN.
Then the customer, Amber Lynn Gilles, took a picture of him.
Starbucks headquarters in Seattle did not immediately return a request for comment from CBS MoneyWatch.
Instead of provoking more reaction to Gutierrez, Gilles' Facebook post really led to a burst of support for the barista. Another said: "I don't blame the kid behind the counter".
Her post was shared more than 49,000 times before Amber took the post down, and since then donations have flood in for Lenin.
The 26-year-old, who doesn't know Gutierrez personally, said he was upset that the barista was "being bullied for doing the right thing".
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The attacker's motives remain unclear as authorities conduct their investigation and details of the incident remain scarce. He was taken to the hospital by a sheriff's deputy due to the extent of his injuries, but later succumbed to injuries.
Gutierrez said that before he was able to explain to her Starbucks policy that all customers wear a mask in the store, he said she "flips me off and she starts cursing up a storm".
The initial goal of the campaign is $ 1,000 - but less than a week later, thousands of people have donated almost $ 80,000.
'I am not scared or bothered by your ignorant fraud a**'s, not sorry you losers got nothing better to do.,' she said on Tuesday.
"I felt baffled and honoured to receive so much support and love when it was at $1000".
Lenin Gutierrez said he would use the money to help him achieve his dream of being a dancer and he would also contribute to organisations in the San Diego community. And workers in certain industries are required wear a mask or respirator while on the job.
The California Department of Public Health (CDPH) reported a daily increase of 5,972 positive cases of coronavirus, with 60 deaths from Friday to Saturday, according to an update released Saturday morning.
A latest research unveiled in early June uncovered that coronavirus spreads generally by using airborne transmission, and wearing a mask is the most productive way to halt particular person-to human being distribute.
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The EU also warned China it would face "very negative consequences" if it pressed ahead with the new bill. More than 1,300 U.S. companies now have offices or regional headquarters in the city.
The team of researchers calculated that the use of a face mask prevented more than 78,000 infections in Italy between April 6 and May 9 and more than 66,000 infections in NY between April 17 and May 9.
But some argue that the act of wearing a mask is political, and that wearing one violates their civil liberties.
"Masks are stupid and so are the people wearing them", she wrote in one post. Medical conditions that could be inhibited by wearing a mask are an exemption.
"Meet up with Lenin from Starbucks who refused to serve me trigger I am not sporting a mask". They can also buy delivery.
In a statement shared online, a Starbucks spokesman said: "We want everyone to feel welcome in our stores".
The CDC "recommends wearing cloth face coverings in public settings where other social distancing measures are hard to maintain (e.g., grocery stores and pharmacies), especially in areas of significant community-based transmission".
New Positive COVID-19 Case in Johnson County
You can find an active map of confirmed COVID-19 cases county by county here, COVID-19 cases in Missouri broken down by county . Of the new cases, two of the people are in their 50s, one is in their 40s, one is in their 30s and one is a child under 10.