holy war
noun
1.
a war waged for what is supposed or proclaimed to be a holy purpose, as the defense of faith.
2.
any disagreement or argument between fanatical proponents of radically differing beliefs, opinions, etc.:
a holy war on the merits of rival computer operating systems; a holy war about welfare reform.
Origin
1685-95
Examples from the web for
holy war
There's almost no way to write about this subject without starting a
holy war
.
When it began last fall, it was the political equivalent of
holy war
.
British Dictionary definitions for
holy war
holy war
noun
1.
a war waged in the cause of a religion