This is considered a training store, so if you tell the manager they will try to correct the behavior.
I visit this Starbucks frequently. One bad apple always rots everything. Speak up, tell the guy how u feel. Demand an apology, and talk to his supervisor. The employee probably doesn't see things in your angle, he will learn and change. Maybe the employee doesn't care, than the employee will be in his journey to find his true passion. No need to be rude on approach, just as true as possible.
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