To Constantinople Harald [Hardrada of Norway] came [in 1032], and, in the service of the [Byzantine] Emperor, led the Varangian Guard against the Saracens in Egypt and Syria, thus anticipating the future deeds of the Normans in the Crusades, and saw Greece and Italy, where he fought with his distant kinsmen the Normans, who were already settled in Italy [all those campaigns happening circa 1033-41].
Thus he observes a logistical framework & military influence from "barbaric" Europe which fortified "civilised" Europe, all which served, either wittingly or not, to deal with an Islamic threat existent before the Crusades began. I think his statement is obviously correct, indeed bold.
Perhaps some egregiously revisionist post-modern historians could learn something valuable, indeed new, from "old & outdated relics" like Johnson : How to be more daring in trying to understand the big picture instead of acting like mere academic stenographers.
