Based on my experience, Indians are naturally more competitive then most neplease. Luckily I haven’t have to work with other Nepali yet, but most time I find Indians more competitive then Nepalese. They intend to achieve what they want by hook or cook. Looks like he sees you as his direct competitor for any future potential growth.

There is no preskription here and reaching out to HR, unless he does something really wacky, would just look bad on you.

You have to treat him as competition, if you want neck to neck competition with him. If you want to let him move ahead and stay laid back then its fairly easy to slow down a bit , let him take a lead and follow him. I am sure he will start treating you well as soon as he realize you are not in same league as he.