You can read this book online here; The Early Years of the Tongues Movement
It is because they are not discerning the hype generated from these movements to sell the apostasy of believing the lie that they can receive the Holy Spirit again apart from salvation, to that which exposes it as not of Him at all by those phenomenon is why they should conclude by Jesus's own words that no evil tree can produce a good fruit & no good tree can produce an evil fruit. It's conclusion has to be, it is all bad and thus not of Him at all.
It is because they are not discerning the hype generated from these movements to sell the apostasy of believing the lie that they can receive the Holy Spirit again apart from salvation, to that which exposes it as not of Him at all by those phenomenon is why they should conclude by Jesus's own words that no evil tree can produce a good fruit & no good tree can produce an evil fruit. It's conclusion has to be, it is all bad and thus not of Him at all.