What was the breaking point that led to the Hutu government ordering the attack of Tutsi rebels across Rwanda?

The signing of a peace treaty.
The Hutu president's plane being shot down.
The assassination of the Tutsi president.
Calls for peace talks from foreign leaders.

The breaking point that led to the Hutu government ordering the attack of Tutsi rebels across Rwanda was the assassination of the Hutu president, Juvénal Habyarimana, when his plane was shot down in April 1994. This event sparked the beginning of the Rwandan genocide, in which Hutu extremists targeted Tutsis and moderate Hutus for extermination.