No.

God commanded his people through Moses not to blaspheme him. He said blasphemers must be cut off from Israel.

When one half-Israelite man blasphemed God’s name, the others weren’t sure what God wanted them to do. So God clarified that anyone who blasphemed his name was to be stoned to death. Even if they were foreigners. So they did.

When Eli’s sons blasphemed God, God rejected them and put a curse on their family forever, with no hope of atonement. Even though God had promised that they would be his priests forever.

The king of Assyria and his commander blasphemed God, so God got the king’s sons to kill him with swords. And when the king of Tyre called himself a god, God said he would send the king’s ruthless enemies to prove his mortality to him.

God had an angel kill Herod Agrippa just because other people called him a god. God didn’t even give him a chance to say what he thought about it.

According to Mark, Jesus said blasphemy against the Holy Spirit is the only sin that God never forgives.

Maybe?

According to Matthew and Luke, though, Jesus also said that “every kind of sin and slander can be forgiven“. And that “anyone who speaks a word against the Son of Man will be forgiven“. So if you sin by slandering the Holy Spirit, God might forgive you. And if you sin by slandering Jesus, God will definitely forgive you.

Yes.

God told Moses to say “I am the Lord”, “I will be your God”, “I am the Lord your God“, and “I, the Lord your God, am holy”. Moses said God said people would know who God was when they saw God strike the Nile with the staff in his hand and turn it to blood. Then Moses struck the Nile with the staff in his hand and turned it to blood.

Jesus told people their sins were forgiven, which was seen as blasphemy, because supposedly only God can forgive sins. Jesus claimed to be God, and people tried to stone him for blasphemy. And Jesus told people they would see him sitting at the right hand of God, which got him sentenced to death for blasphemy. If Jesus is indeed God, then we should follow his perfect example and say the same blasphemous things.

When Jesus’s enemies objected to him calling himself God, Jesus argued that the scriptures say it’s okay for humans to call themselves gods.