In case you didn't notice, we are in the 21st Century and "right of conquest" is somewhat frowned upon in polite conversation. Taking over a land militarily and dispossessing and forcefully ruling its native population is what we call now "occupation", and it tends to be illegal. If Amira Hass denounces the practice is because she probably has a better grasp of ethics than you.
Egyptian court sentences Al-Jazeera journalists to 3 years in prison (Reuters)
from the article: The Israeli occupation echoes from Cairo