Venezuela is a mess. Food supplies are low, their currency is worthless and the refugee crisis has made its neighbors take action to slow the migration.
Hezbollah, Hamas and Al-Qaeda, have a strong presence in South America. They are particularly active in the Tri-Border Area (TBA), the region where Brazil, Paraguay and Argentina meet.
Mass exoduses from Cuba have occurred in recent history, but the latest wave could significantly impact border security protocols in South Texas.