I personally think if you are a Hindu and follow the religion then you should not be eating BEEF.
It's not about being a Nepali or not.
Personally I believe that hurting and killing other animals only shows our barbarism. Today humans are not only hurting and killing other animals but even doing the same to it's own fellow humans.
Moving on to the next level, here are some of my thoughts. Never mind if these don't make any sense to you!
We have come a long way as humans, we feel pain for others, we express it and we take action to stop it; but we still have a long long way to go before we, as humans, realize our responsibility as the most intelligent animal in this planet and start living in peace and harmony with the nature. That day is not easy to come by, we should be much more advanced to maintain the balance. The world will be just perfect with the technology maintaining the law and order  in the living society, balancing the number and varieties. In other words, there won't be any injustice to any living being. I believe that day humans will, finally, decipher why we are here.