Why appreciating only after death?

It refers to Lal Krishna Adwani now in a virtual praise for former Indian Prime Minister Indira Gandhi when the veteran BJP leader has now discovered that Indira Gandhi was perhaps thinking to liberate Pak-occupied-Kashmir (PoK) like was done in her regime to liberate Bangladesh. There are many Congress leaders like Sardar Vallabh Bhai Patel which later became role-models for BJP but only after their deaths. Politics of rivalry in life-time and praise for thoughts of such rivals after their deaths, should better be replaced by politics of cordiality in larger national interest when responsible and respectable leaders from ruling and opposition should sort out political differences amicably rather than being involved in wasting hard-earned tax-payers? money on stalling Parliamentary proceedings continuously for weeks and months.