Perhaps the biggest difference between you and someone applying for the job through the h1b visa program was that they were born in a different set of circumstances than you were. They were likely born in India whereas you were born I the United States. As a result of being born in India, they went to a local school there which didn't teach them about hash tables and concurrency. Your school did, and you had a better education. This person from India is trying to make a better life for himself despite starting at a disadvantage in life(being born in a poor country with access to lesser educational opportunities than you). You are welcome to reject him for the job(you can do so at the resume screening state, especially if they don't have the relevant skills and experience) but I think it would be useful to remember that the other person is a human, likely disadvantaged, and express some human empathy.