Why extremist/terrorists target holy places?

[Arleitter]

@Decent_6Chora

because they have their own agendas and have nothing to do with religious cause. Do you think someone fighting for Islamic cause can blow up mosque? someone fighting for Hindu cause can blow up temple?

But what is the mileage they are getting ?O.K I agree,they have an agenda but how do they accomplish by targeting shrines?Are thy not alienating themselves? Do not you think they know it clearly?