Third meaning of "blasphemy":

"Blasphemy" is irreverence toward anything considered sacred.
If you set something apart in honor of something of someone;
and then someone else dishonors it --- that would be "blasphemy".
To vandalize a place of worship or a cemetery would be considered
"blasphemy".

From page 298, Always Growing in the Faith, by Gene Dirr.
Available at www.amazon.com.