Government is both necessary and is evil. It is necessary, because it is human nature to be selfish. Those who are not educated (or educable) to appropriate behavior in society will attempt to cheat and steal to get what they want. The force of government, therefore, is needed to restrain such people from harming us. This applies as much to the foreign and terrorist army as it does to the common criminal. Martin Luther wrote that if everyone be a practicing Christian, there would be no need for government. However, we all know this is not so.
However, those who wield the powers of government are capable of great evil, as we are seeing more clearly every day.
The statist sees government as necessary, but not evil.
The anarchist sees government as evil, and not necessary.
I suggest that the most appropriate approach is that suggested by our Founding Fathers. Keep government as small and as local as possible (decentralism), bound as tightly as possible to a set of rules (the Constitution) and to representatives who are conscientious in carrrying out the will of the people. This way, government is strong enough to do what is necessary, and restrained from doing what is evil.