Both kurdish and irish unification movements

have employed violence and terrorism.

Explanation:

Kurdish unification was led by several groups who launched continuous attack to the central government who held the power at that time.  Irish unification was led by groups of nationalists who have an ethnocentric leaning ideology. Both of these movements were accompanied by violence that spread terror for common civilians.

answer: to communicate with people on the other side.

explanation:

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.