As reported by Censor.NET, he said this in an interview to Izvestia.
"I never called to turn America into radioactive ashes. I just stated that Russia was the only country in the world having enough military power to repulse external aggression. I believe this statement is anti-war and calling the U.S. to act more cautiously and more responsibly in the world.
"By following the demonization path, the Europeans have also made up that I was supportive of Russia's troops' invasion into Ukraine, and implemented personal sanctions against me based on this. I would never call to invade Ukraine with our troops," Kiselev said.