The fact is that the Politics is the cause of wars. The war is about control and power.
Religion is the illusion factor of the so called religious wars.
The elite use religion to gain support of the masses and they do this by reflecting that people s religious freedom is being oppressed. However, often the truth is that the political control or authority of such religious war shouters is under danger of being exterminated. People are brought under the illusion that they are fighting for some faith. In reality, the leaders who call upon war are insecure about their authority and to gain the complete power strike a war against those who are a threat to their position. Nevertheless what you say is true to a certain extent.