Is different religions/cultures the reason for world conflict/terrorism?

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I think it partly is, i.e Northern Ireland, which is between two Christian denomonations and who N Ireland should belong to, the UK, Ireland or both, beween Israel and Palestine between Muslims, Jews and Christians all land over , which is petty, India and Pakistan between Muslism and Hindus etc and in Africa between Arabs in the North and Black Southern Africans Why can't we live in a conflict free world and respect others, whatever religion or not, they choose to believe or is that too easy for some to follow? What do others think?