Blasphemy to whom? When was Lucifer created? When did Lucifer rebel? And remember Saul Alinsky in his Rules for Radicals gives praise to the first 'radical' rebellion. That 'fall' was the reason for why this earth looks pretty much the way we find it today. Genesis does not say anything more about the rebellion than what we find in Genesis 1:2... And busy little fingers place the verb was in Genesis 1:2 instead of 'became'. Isaiah says that God did not create this earth void and without form... it became that way. Jeremiah tells a bit about that time, as does Isaiah and Ezekiel. Peter and Paul write about that time also. So when you use the term blasphemy I would like to know who is blaspheming whom.
To those that believe his word, and do not look to reduce it to a fallible level.
"When was Lucifer created?"
That is not covered by the chronology we are given.
"When did Lucifer rebel?"
It had to be after the six days of creation, because at the end of the sixth day, God said that it was "very good," which would have not been true if rebellion had occurred at that point.
" Isaiah says that God did not create this earth void and without form... it became that way."
Sorry, that simply is not true. The Earth had to be without form at some point if it didn't always exist. (which it obviously didn't)