Dear China is a worry for the rest of the world specially USA because of it's military might....Look if we have a war with China...niether of the countries can win......it will be a nuclear deadlock......so that way China is not a threat.....as niether of us (India and China) can afford to attack each other........
But with Islamic militants it is a different story all together. A person who is ready to blow himself up....surely does not bother about the end of the worls or his own people....in case of a nuclear back lash by India.......in that way islamic jehadis armed with nuclear weapons r a far greater threat than any responsible nation.........because they can use it......