How are terrorism and genocide alike? how are they different?

Both terrorism and genocide are similar in the fact that these actions are aimed to damage or even destroy a determinate society or a significant part of it.

But terrorism usually is developed on a lower scale, with separated sporadic attacks carried out by illegal terrorist groups, while genocide is usually carried out by legitime groups or even governments, with a large scale and continuous-in-time operations.

either b) they were often feared and despised by other native cultures. or

c) their obsession allowed them to coexist with many other native cultures because of their peaceful nature.