The phrase "senseless slaughter" refers to the killing or destruction of a large number of people or animals in a way that is pointless, without reason, or lacking any understanding or empathy. Full definition
Making war to prevent the further senseless slaughter of my countrymen is perfectly justified, however.... (religion-online.org)
We have had enough senseless slaughter and we carry with us the power of change. (religion.blogs.cnn.com)
Originally intending to bury his boy in Arlington Doc finds the morality of a military burial increasingly complicated as he and fellow Vietnam cohorts Sal and Mueller are forced to weigh up the consequences of yet more senseless slaughter resulting from heavy - handed American intervention overseas. (flickeringmyth.com)