I believe Yeshua, the Only Begotten Son of Our Heavenly Father is my Saviour.
His Blood has cleansed me of the guilt of my sin.
Anyone may question another's faith.
Anyone may question any of the gifts of the Holy Spirit.
Questioning is just that, except when it is inquisitional or accusative.
The way I understand the Word, when it states to speak in tongues quietly for one's own edification, that is what it means.
Granted other forms of the employment of this gift are mentioned.
So to question this is tantamount to questioning one of the faith if he has any faith at all or accusing him of not believing at all.
Tongues will pass as is written along with prophesy, healing and other gifts of the Holy Spirit, the only gifts that will survive the fire next time are faith, hope and love, and they all depend upon love. At present I believe tongues is still a gift of the Holy Spirit, and it is not to be ridiculed in any manner, although I have seen it here in this thread. May God have mercy on the scoffers, amen.
The Blood of Yeshua is our salvation, amen.