There are plenty of arguments with which one may (and personally I think should) oppose capital punishment, but to oppose it
by suggesting that lethal injection is
as barbarous
as gassing or
electrocution is unwarranted.
600 was founded to end the inhumane killing of millions of strays around the world, beginning with about sixty countries where there are no laws against cruelty to animals, and where strays are killed
by methods such
as poisoning,
electrocution, beating, shooting, lacing rotten meat with broken glass, and drowning.