GENOCIDES-Will we ever learn?

As much as humankind can shine in their discoveries, inventions, intellectual and technological prowess; they are blighted by their record of genocides .
The word Genocide is derived from greek [GENOS=Race]. It means " The systematic and planned extermination of an entire national, racial, political, or ethnic group".
Mankind has regularly involved in these barbaric acts too many a time for any complacency. We should have learnt our lessons from the Holocaust perpetuated by the vile Nazi regime. Despite many Holocaust museums and rememberance days, present day genocides continue. It belies our belief that we can allow such acts to happen. For long we have ignored them.
It always begins with hate and vindictiveness against a particular race or ethnicity ; and then it leads to planning of genocide. We saw this happen in Rwanda and we see this happen in Darfur. WE SHOULD NOT IGNORE HATE and SHOULD NOT TOLERATE HATE!
As one noted jewish holocaust survivor said " If not violence , what can hate against a race lead to?". Genocide is a pestilence and it should without much ado, eliminated.