Scripture reveals it's not wise to talk against something you clearly do not understand.Correct. Today’s “tongue-speaking” is jibber jabber. That’s not what speaking in tongues was in the first century.
Matt 12:36-37
"...every idle word that men shall speak, they shall give account thereof in the day of judgment.
For by thy words thou shalt be justified, and by thy words thou shalt be condemned.
1 Cor 14:2
"For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries."
Jude 20-23
"...beloved, building up yourselves on your most holy faith, praying in the Holy Ghost,
Keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ unto eternal life.
And of some have compassion, making a difference:
And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh."