Create wars that displace and kill millions, destroy their cities, villages, homes, jobs, future and lives - from which such “conflicts”, atrocities, crimes against humanity make some rich.
After the nations and homes are destroyed and people must flee or die, they are fenced-out or herded into pens, like cattle, denied aid or hope for a timely end to the horrors.
Rich nations begin to fear only when the consequences of their complicity and/or inaction to end the causes of mass displacement affect them directly! They “suddenly” become aware of the monster they created or allowed to grow - they ignore the criminal players that fomented, funded, armed, ignored or covertly influenced/advanced the conflicts, and focus on the victims only, to keep them out.
The “conflicts” this time allow refugees, victims of the depraved, to enter Europe en masse; Syria, Iraq, Libya, and warrant action, unlike “conflicts” in distant places or where victims/refugees could be controlled.
Only when the homes & wealth of the nations responsible, complicit, turning a blind-eye are affected will they act to “end” the conflict and sudden “tragedy”…