How is this book supports any thing even remotely in either favor.

If anything , this applies more to religious terrorists ie. Hamas.

Not to a national democratic state

Related part from Wikipedia:

> Becker argues that the conflict between contradictory immortality projects (particularly in religion) is a major source of the violence and misery in the world such as wars, genocide, racism, nationalism and so forth since immortality projects that contradict one another threaten one's core beliefs and sense of security

There you go.