It's a strange attitude to have, because it implies that everyone else should be trying to murder them to protect themselves.
Isn't that what we've been doing for most of human history? Family against family, clan against clan, tribe against tribe, village against village and so on for most of human existence?
Most of European history from the Greeks onward can be seen as some kind of action/reaction to this dynamic. Established civilizations expanding their territories for both economic accumulation but also attempting to build buffers against other expanding or migration civilizations that threaten their borders.
Roman history can easily be interpreted as a continuous defensive expansionism designed to check the destabilizing influence of Germanic migrations from the North and Parthians in the East from time of Marius all the way to Marcus Aurelius. Much of European history from the 7th century through the 12th century can be defined as action/reaction to Viking expansion, from then on attempts to fix borders against expanding Mongols and Islamic armies from the conquest of Hungary, the Crusades and through the Siege of Vienna.
You could argue that almost purely economic colonialism on the part of Europeans didn't even really start until the general borders of Europe were largely established and fortified and external threats were minimized in the 17th century and even then such expansion was motivated by political and territorial stalemates of a fairly established European states and borders. The "new worlds" were conquered for their economic value but this can easily be explained as defensive maneuvers to outflank their local European rivals as well.
And the European conflicts from the 100 Years War, 30 Years War, Spanish Armada, the Napoleonic Wars all the way through WW I and II are attempts to establish hegemony and secure borders within Europe itself.
It would seem that the entire course of human history can be interpreted as a series of conflicts designed to secure specific regions against outsiders who threaten territorial independence and economic security.