I hope the following helps you in your quest:
20 But the prophet who dares to speak in My name a message I have not commanded him to speak, or who speaks in the name of other gods—that prophet must die.’
21 You may say to yourself, ‘How can we recognize a message the Lord has not spoken?’
22 When a prophet speaks in the Lord’s name, and the message does not come true or is not fulfilled, that is a message the Lord has not spoken. The prophet has spoken it presumptuously. Do not be afraid of him.
Deut 18:20-22 (HCSB)
15 Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves. 16 Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles? 17 Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.
Matt 7:15-17 (KJV)
20 Wherefore by their fruits ye shall know them.
Matt 7:20 (KJV)
27 The anointing you received from Him remains in you, and you don’t need anyone to teach you. Instead, His anointing teaches you about all things, and is true and is not a lie; just as it has taught you, remain in Him.
1 John 2:27 (HCSB)
10 “But this is the covenant that I will make with the house of Israel
after those days,” says the Lord:
“I will put My laws into their minds,
and I will write them on their hearts,
and I will be their God,
and they will be My people.
11 And each person will not teach his fellow citizen,
and each his brother, saying, ‘Know the Lord,’
because they will all know Me,
from the least to the greatest of them.
Heb 8:10-11 (HCSB)
10 Love consists in this: not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins.
11 Dear friends, if God loved us in this way, we also must love one another.
12 No one has ever seen God. If we love one another, God remains in[7] Or remains among us and His love is perfected in us.
13 This is how we know that we remain in Him and He in us: He has given to us from His Spirit.
14 And we have seen and we testify that the Father has sent the Son as Savior of the world.
15 Whoever confesses that Jesus is the Son of God—God remains in him and he in God.
16 And we have come to know and to believe the love that God has for us. God is love, and the one who remains in love remains in God, and God remains in him.
1 John 4:10-16 (HCSB)
8 On the contrary, what does it say? The message is near you, in your mouth and in your heart. This is the message of faith that we proclaim:
9 if you confess with your mouth, “Jesus is Lord,” and believe in your heart that God raised Him from the dead, you will be saved.
10 With the heart one believes, resulting in righteousness, and with the mouth one confesses, resulting in salvation.
11 Now the Scripture says, No one who believes on Him will be put to shame,
12 for there is no distinction between Jew and Greek, since the same Lord of all is rich to all who call on Him.
13 For everyone who calls on the name of the Lord will be saved.
Romans 10:8-13 (HCSB)
18 For to those who are perishing the message of the cross is foolishness, but to us who are being saved it is God’s power.
1 Cor 1:18 (HCSB)
There is no way the apostate teachings, unscriptural practices and lack of love they show others can make them 'right' according to God's Word. You can believe what the Bible says or you can believe what the WTNTS says but if you try to believe both at the same time the cognitive dissonance can drive you out of your mind.