Classical historians believe…

Even the relatively sober biographies of Alexander the Great, for example, that are still in existence date from the late first and early second centuries AD. Yet Alexander died in 323 BC, so there is a gap of about five hundred years before his biographers Plutarch and Arrian wrote their books about his life. Both writers, however, acknowledge copious indebtedness to previous written sources, and classical historians believe they can derive in great detail accurate historical information about Alexander from these works, while at the same time recognizing they are no means flawless.

Craig Blomberg, from Making Sense of the New Testament, p. 27

Theology and history are not opposites…

Theology and history are not opposites. A historian can hold strong views about the significance of certain events and still write reliable history. In fact, partisan proponents of a given point of view are sometimes even more accurate than detached observers; consider, for example, the first impassioned accounts from Jewish sources of the Nazi holocaust which turned out to be more accurate than the reports of ‘objective’ news media.

Craig Blomberg, from The Historical Reliability of the Gospels, p. 41