Do you have an irrational, creeping fear of insects? Allow us to replace it with an entirely rational terror of them! Check this: A slavemaker queen fakes death, allowing itself to be carried into an enemy nest. There, it then rips their queen apart, coats itself in the bits left over, then immediately starts pumping out soldier eggs. The locals then raise their own enslaving army to maturity.
The new 100 percent soldier-baby society pretty rapidly runs out of locals, so they mount expeditions to break into other nests, bite the locals in half and steal their eggs. This is a species for whom murdering parents and enslaving the children is genetically programmed. It's a hive-minded hybrid of Hannibal Lecter and Hitler with a suicidally dedicated army of millions. We can therefore at least say this one isn't made by Satan, if only because he wouldn't risk creating his own replacement.
So how do we finish them off?
This provides a bit of a challenge for conservationist, because the only way to keep it alive is to provide a steady supply of other ants for it to kill. Talk about robbing Peter to pay Paul, and since in this case "Paul" is an army of millions of fascist ant-supremacist slavers, we're on Peter's side here. Fuck Paul. Fuck Paul with fire, and pour salt on the ashes.
Slavemaker ant, menacing a kitten (kitten added for illustration purposes)
Being an expansionist slave-owning culture is one thing--all you need to do is invent pointed sticks, bronze or gunboats before everyone else and you're in charge. But a genocidal slave race that's endangered? When you're winning you're a "culture," but when you're losing you're "vicious hateful bugs that will be stomped flat as soon as we find boots utterly airtight enough to avoid the risk of touching you."