'Unbelievers' in the Bible

Instead, does a Christian sue a Christian, and do this before unbelievers?

So then, tongues are a sign not for believers but for unbelievers. Prophecy, however, is not for unbelievers but for believers.

So if the whole church comes together and all speak in tongues, and unbelievers or uninformed people enter, will they not say that you have lost your minds?

But to the cowards, unbelievers, detestable persons, murderers, the sexually immoral, and those who practice magic spells, idol worshipers, and all those who lie, their place will be in the lake that burns with fire and sulfur. That is the second death."