Are illegal supporters responsible for loss of American lives?..?

Few pages before one answerer commented that blame for Mexican drug cartels murdering of each other, lies squarely on shoulders of American drug users. To me this is preposterous thinking, since no one can force anyone else to commit crime-to peddle drugs, or murder another person-I would not sell drugs-much less behead another man, even if I and all my children were hungry. But if we go by this theory, then aren`t pro-illegals, as guilty as illegals themselves, of 1.000`s of lives of U.S. citizens taken illegals?..