But which God should they follow bulma?
What do I care? Refer to this passage in Joshua 24.
14 “Now fear the Lord and serve him with all faithfulness. Throw away the gods your ancestors worshiped beyond the Euphrates River and in Egypt, and serve the Lord. 15 But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the Lord.”
The Jews repeatedly declare they will serve the Lord, despite the fact that he is a jealous God. I will serve the God that I know, even if people around me declare him the devil.
What good is it for someone to gain the whole world, yet forfeit their soul?
When you "gain the whole world" you are trying to make people
happy. But God will not necessarily be happy with people-pleasing.
And in regards to the other concern...
20Then Jesus went home, and once again a crowd gathered, so that He and His disciples could not even eat. 21When His family heard about this, they went out to take custody of Him, saying, “He is out of His mind.”
22And the scribes who had come down from Jerusalem were saying, “He is possessed by Beelzebul,” and, “By the prince of the demons He drives out demons.”
23So Jesus called them together and began to speak to them in parables: “How can Satan drive out Satan? 24If a kingdom is divided against itself, it cannot stand. 25If a house is divided against itself, it cannot stand. 26And if Satan is divided and rises against himself, he cannot stand; his end has come. 27Indeed, no one can enter a strong man’s house to steal his possessions unless he first ties up the strong man. Then he can plunder his house.
You can call this God that I worship a demon if you want, but know this. If you speak evil of Jesus's purpose, you are blaspheming. Jesus is not a butcher. Nor is the Holy Spirit concerned with doing evil to men, or following Satan's mission of accusation.
This idea that Satan rules this world (God does) and that God accuses us is absolutely conflating God and Satan.
There are indeed prophets inspired by God to write his prophecies.
But let me ask you... do all prophecies come from God?
When John Edwards does a psychic reading, telling people they look like they are a physicist, is this really God's work? What about Nostradamus and his trendy predictions, are these God's work? No!!! There are people who are very much motivated by their own ends. Some desire fame or money. Some want to ruin the fellowship of the believers. Some are evil men looking to stir up mischief.
All truth prophecies pointed to Jesus, his birth, death, and resurrection on behalf of our sins. But Jesus himself told us to stop listening to prophets that came after him, warning that they would be false prophets. A true prophet expends their energy trying to get people to live according to the Way of God. A false prophet leads people into a pit.
Consider the judgement of the Pharisees. Then consider Job. He had several men telling him that surely he neglected the poor or forgot to tithe or what have you. Now, God also put him to task when he appeared in a whirlwind. But afterwards, he trashed all of the people who told Job "you must have done something wrong." It would be better to tell people nothing, that try to convince them they are evil based on your narrow-minded and possibly wrong ideals.