All of Christendom’s ministers claim to represent God but they 
seldom bring up the fact that God has a name. We can study the
Bible with them for years and they will usually refuse to acknowledge
the existence of Jehovah mostly because they consider Jehovah
to be the Jewish God and Jesus, the Christian god.

But what does the Bible say about Jehovah?

29 Is God the God of Jews only? Is he not the God of Gentiles too?
Yes, of Gentiles too,
(Romans 3:29) (NIV) -BibleGateway

Which God?

⁵ I am Jehovah, and there is none else; besides me there is no
God. I will gird thee, though thou hast not known me; ⁶ that they
may know from the rising of the sun, and from the west, that there
is none besides me: I am Jehovah, and there is none else.
(Isaiah 45:5,6) (American Standard Version) -BibleGateway

Yes, that is from the American Standard Bible. Most ministers
refuse to use that Bible version because Jehovah’s name is
restored to where it originally appeared in 6,000 places. But
the popular King James Bible also has Jehovah’s name in it:

3 And I appeared unto Abraham, unto Isaac, and unto Jacob, by the name
of God Almighty, but by my name JEHOVAH was I not known to them.
(Exodus 6:3) (King James Version)-BibleGateway

18 That men may know that thou, whose name alone is JEHOVAH,
art the most high over all the earth.
(Psalms 83:18) (KJV) -BibleGateway

So, should the ministers talk about God’s name to their congregations?

¹ And now, O ye priests, this commandment is for you. ² If ye will not
hear, and if ye will not lay it to heart, to give glory unto my name, saith
Jehovah of hosts, then will I send the curse upon you, and I will curse your
blessings; yea, I have cursed them already, because ye do not lay it to heart.
(Malachi 2:1-2) (ASV) -BibleGateway

Jesus is very important to us as God's son, but Jehovah’s Witnesses
also believe that it is vital for us to know God Himself and God’s name
because He promises to save us if we call upon Him and Him only:

³² And it shall come to pass, that whosoever shall call on
the name of Jehovah shall be delivered;
(Joel 2:32) (ASV) -BibleGateway

Most people don’t care about Jehovah's Witnesses' beliefs and cling to
the ones they like. People say things like, "I want to worship God my
way!" and "Jesus is my God and I will worship him if I want to!"

That doesn’t bother them. Noah truthfully told his people that
the Ark was the only safe place to be when the rains came, but
they scoffed at him too. In the end, they all drowned. Jehovah's
Witnesses believe that this world, as we now know it, is also going
to end soon but there won’t be an ark to save us this time. This
time, faith in Jehovah is what it will take to survive:

2 I will say to Jehovah: "[You are] my refuge and my stronghold,
My God, in whom I will trust." 5 You will not be afraid of anything
dreadful by night, Nor of the arrow that flies by day, 7 A thousand
will fall at your very side And ten thousand at your right hand; To
you it will not come near. 8 Only with your eyes will you look on
And see the retribution itself of the wicked ones.
(Psalms 91:2, 5, 7-8) New World Translation

Tens of thousands will die? How bad will it get?

"And those slain by Jehovah will certainly come to be in that day
from one end of the earth clear to the other end of the earth. They
will not be bewailed, neither will they be gathered up or be buried.
As manure on the surface of the ground they will become."
(Jeremiah 25:33) (Young's Literal Translation) -BibleGateway

Most people say, "But Jesus loves us! He will protect us!"

What does Jesus say?

"...but the world must learn that I love the Father and that
I do exactly what my Father has commanded me."
(John 14:31) (NIV) BibleGateway

And what is his Father's plan?

"But God shows his anger from heaven against all sinful, wicked people
who push the truth away from themselves. So God let them go ahead
and do whatever shameful things their hearts desired. As a result, they did
vile and degrading things with each other's bodies. That is why God abandoned
them to their shameful desires. Even the women turned against the natural way
to have sex and instead indulged in sex with each other. And the men, instead
of having normal sexual relationships with women, burned with lust for each
other. Men did shameful things with other men and, as a result, suffered within
themselves the penalty they so richly deserved. Their lives became full of every
kind of wickedness, sin, greed, hate, envy, murder, fighting, deception, malicious
behavior, and gossip. They are backstabbers, haters of God, insolent, proud, and
boastful. They are forever inventing new ways of sinning and are disobedient to
their parents. They refuse to understand, break their promises, and are heartless
and unforgiving. They are fully aware of God's DEATH PENALTY for those
who do these things, yet they go right ahead and do them anyway. And,
worse yet, they encourage others to do them, too."
(Romans 1:18,24,26,27,29-32) (NLT) -BibleGateway

What Death Penalty?

⁹ Don't you know that those who do wrong will have no share in the
Kingdom of God? Don't fool yourselves. Those who indulge in sexual
sin, who are idol worshipers, adulterers, male prostitutes, homosexuals,
¹⁰ thieves, greedy people, drunkards, abusers, and swindlers--none of
these will have a share in the Kingdom of God.
(1Corinthians 6:9-10) (NIV) -BibleGateway

Will these "good Christians" really be destroyed?
Why won’t Jesus save them?

"Not everyone who calls me their Lord will get into the kingdom of heaven.
Only the ones who obey my Father in heaven will get in."
(Matthew 7:21) (Contemporary English Version) -BibleGateway

And what does Jesus’ Father require?

²³ "Have I any pleasure in the death of the wicked? saith the Lord
Jehovah; and not rather that he should return from his way, and live?"
(Ezekiel 18:23) (ASV) -BibleGateway