Shrestha Babu,
I like your dedication towards your culture. But take a time to think this way, these leaders(regardless of caste) want you to believe what they say. They are conveying this message of hate. I know majority of leaders in our country are bahun/chettri but NEVER judge people based on single fact.

All we need for our country now is unity in diversity and it is not happening. It won't happen but smart and intelligent person like you may want to take your time and think twice. Let's discuss the full history, lets find out whats wrong with newars  that they failed their kingdom. I am not an expert, but I think newars lost the war not because they are drunk or weak. In my understanding, Shah  chaged their "rananiti"(war rule??) in last minute and Mallas did not have time to figure out. Again, I am not an expert.

If you really want to believe what you believe, I dont have anything to say but if you want solution, there are plenty.
P.S - I am bahun and I love newari culture.