Yes, the combination of politics and social division is very dangerous and explosive. For example,
1. The partition of India and the accompanying communal riots were a result of the fact that politicians exploited the Hindu and Muslim division in India.
2. In Northern Ireland, the mixture of politics and the division between Catholics and Protestants led to years of violence.
3. In Sri Lanka, the politics of the division between Sinhalese and Tamils led to civil war