The unforgivable sin is rejection of Jesus Christ, Our Lord.
Everything else can be forgiven whether it be a killing spree or stealing a nickel from a register.
I apologize to the OP and the Madbunny for going off topic here, but I am so shocked by this statement.
So your god does not really care about sin or evil or even following his complex and confusing rules? He doesn't care which human beings are good, and which are evil?
ALL he wants is to be worshipped?
That is it?
He does not sound like a very nice god. WHY would you worship him if he stands for nothing but his own adoration?
Imagine a father who buys his children everything. The kids treat their gifts like crap and break them and say "You'll just buy me a new one dad, so who cares?"
Would the father have no right to be upset and scream at how they are taking things for granted?
Or would the father have a right to teach the kids a lesson?
So imagine how selfish it sounds when people don't care about God's gifts and say things like, "God will just give us more if he's all-powerful! He can make a new Earth for us!"