Answer:
Causes of ethnic conflict are intolerance between different ethnic groups, aspiring for independence, and suppression.
Step-by-step explanation:
There have been ethnic conflicts around the world for thousands of years, there still are, and it seems that there will be many more in the future as well. The reasons are numerous for such conflicts and over time they have changed at least the primary ones. Nowadays, ethnic conflicts are mainly based on intolerance, wanting independence, and suppression.
Some ethnic groups simply don't seem to stand each other historically, and this intolerance often leads to violence and larger conflicts. An example of this is the conflict (with genocide) in the '90s in Rwanda between the Tutsis and Hutus.
Some ethnic groups feel as they have been occupied, that they don't share common values with the country under which government they are, and they want to be independent entities. This results in conflicts between the ethnic group that wants independence and the majority group that doesn't want to give up the territory. An example of this is the several conflicts between Chechnya and Russia.
Some ethnic groups are supressed by the majority groups so they want to be independent and have their rights instead of being deprived of them. This often can cause the bloodiest and longest conflicts. An example of this is the ongoing conflict between Turkey and the Kurds.