How is "Sidd Bikkannavar" even remotely "Muslim sounding"? It's a Hindu name. He probably shortened it from "Siddarth" Bikkannavar to Sidd Bikkannavar like most Hindus in foreign countries do. Bikkannavar is a place in Karnataka, India. Maybe that is his parent's place of origin.
Does it sound like a white Anglo-Saxon Protestant name to you? These border cops aren't exactly the cream of the law enforcement crop, if it sounds foreign, time to search! Because ISIS will of course send people here for terrorism named "Achmed al-Jihadi" and not "Bob Smith".
This is the USA were talking about. Have a turban? You're probably Muslim. Funny sound, non-Latin name? Possibly Muslim.
I'm sure some family of a CBP agent or super patriot will jump in to defend them. The CBP answers to no one except the president so good luck in getting a legitimate reason from them.
One furriner is very much like another. I've had to explain to people worried about a Sikh temple that Sikhism is its own religion. Lots of people are neither well aware of nor interested in the rest of the world, they only like what they already know.
How could I possibly know what sort of accent you have? I know absolutely nothing about you other than your screen name and what you wrote yesterday. I don't even know what country you come from or what gender you are.
'Furriner' is a good word to describe someone whose lack of interest in the outside work is so fundamental that they aren't interested in even spelling it properly. I'm not applying it to you, I'm using it to point out that many people are xenophobic to the point of being indifferent to where foreign people come from or what differences exist between them, they're just 'not from around here' and therefore undesirable. This attitude exists and is widespread, I don't know why you're upset at me for pointing that out.