Didn't blasphemy in the Bible have to more with the claims that Jesus's miracles were the result of demonic influence. Jesus said that blasphemy against the Holy Spirt was the unforgivable son.
So with these things in mind what is blasphemy? Is it ignorance, insanity, or something else?
las·phe·my noun \ˈblas-fə-mē\
: great disrespect
shown to God or to something holy
: something said or done that is disrespectful to God or to something holy
Full Definition of BLASPHEMY
a : the act of insulting or showing contempt or lack of reverence for God
b : the act of claiming the attributes of deity
: irreverence toward something considered sacred or inviolable
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Examples of BLASPHEMY
She was condemned by the church for uttering blasphemies.
<in the 17th century the Quakers were persecuted for beliefs and practices that older churches regarded as blasphemies>
Rev 17 ;3 Aramaic Bible in Plain English
And he brought me to the wilderness in The Spirit, and I saw a woman who sat on a blood-red beast full of blasphemous names,
which had seven heads and ten horns.