Muralidhar das,
Are you aware of the paddhati of Gopal Guru Goswami? If you are, why are you using the expression "guru-given siddha deha"? Even your own guru, Bhaktivinod Thakur, gave siddha pranali to his disciples, and he received it from his diksha guru! If you or your gurus don´t accept it, fine. But it is not so clever to criticise it and at the same time praise people who practised it. It is not reasonable at all.