Thirty years ago the world failed to stop the Rwandan genocide. Now we fail Gaza | Chris McGreal

The same countries that said never again' after Rwanda have given Israel a free pass during six months of death and destruction

As the war in Gaza grinds through its deadly sixth month and allegations of war crimes by Israel pile up, this week also marks 30 years since the world turned its back on Rwanda's Tutsi minority.

The 100 days of killing that became known as the Rwandan genocide began on 7 April 1994. Hutu extremists murdered about 800,000 Tutsis while major powers, led by the US, found reasons not to save them.

Chris McGreal writes for Guardian US and is a former Guardian correspondent in Washington, Johannesburg and Jerusalem