Charity is not "brotherly love". That would be the Greek word "phileo".
Charity in the KJV is the Greek word "agape". It means love that is an act of the will. Agape can either be positive or negative. Charity can indeed "be placed towards sinful lusts".
John 12:43) For they [the Pharisees] loved the praise of men more than the praise of God.
"loved" there is "agapeo", the verb form of the word "agape" used in 1 Cor 13. 1 Cor 13 describes the characteristics of the love (or charity, if you prefer) that we are to have towards others.
Sometimes it's beneficial to look at the Greek and not rely on the KJV.
The word charity, as found in the KJV, ALWAYS EXPRESSES CHRISTIAN LOVE FOR OTHER CHRISTIANS. The word charity is never used in the KJV to express the love relationship between God and man, a husband and his wife, between parents and their children, or between the believer and the nonbeliever.
It is always used in reference to the love Christians should have for other Christians.
However when the new versions tell us that "love (agape) thinks no evil, does not rejoice in iniquity, but rejoices in the truth" (NKJV), then
this creates several direct contradictions with the rest of Scripture.
If "love seeks not her own and thinks no evil", and if "love rejoices not in iniquity but rejoices in the truth" then what do we do with the following Scriptures where "love" (agape) clearly seeks her own and does rejoice in evil and not in the truth?
John 3:19 And this is the condemnation, that light is come into the world, and men LOVED darkness rather than light, because their deeds were evil. Agape
John 12:42-43 they did not confess him, lest they should be put out of the synagogue: For they LOVED the praise of men more than the praise of God. Agape
Luke 6:32 for sinners LOVE those that LOVE them. Agape
2 Timothy 4:10 For Demas hath forsaken me, having LOVED this present world... Agape
2 Peter 2:15 Which have forsaken the right way, and are gone astray, following the way of Balaam to son of Bosor, who LOVED the wages of unrighteousness. Agape
1 John 2:15 If any man LOVE the world, the love of the Father is not in him. Agape
It should be clear that the one who insists the word 'agape' means an unconditional, God-type love has not compared Scripture to Scripture. Words have different meanings in different contexts, and in 1 Corinthians 13 the King James Bible's rendering of "charity" is far more accurate and consistent with the rest of Scripture. It is the modern versions that create the contradictions!