If an alien race is that advanced that they could handle neutron start stuff, they would have no need to destroy humans in such a careless fashion, they would just create a virus to wipe us all mammals leaving non-mammalian life forms in tact. The alternative would be to create an artificial dna implant which renders humans passive in the main, tuned to a specific electromagnetic wavelength controlled by the ‘aliens’ ... and that is what the Bible predicts in so many words when the antichrist comes to power.
If that advanced, one missile from outside the solar system can be sent, with a virus to kill all targeted life. Easy peasy lemon squeezy. Hollywood and the CIA have got it all wrong. No landing craft needed. Heck they could just lob asteroids at us from the belt too.
This is part of the Dark Forest theory - a corollary to the Fermi proposition about aliens.
All races hide but when discovering a new competitor the attack must be from a long distance - light years or close to it so the attack cannot be traced back and sure kill. No one would want to get as close as you suggest, lest they be discovered. Its fire and forget, then scoot away.
The best attack would launch a seed which on entering the solar system, ‘blossom’, transforming the entire system from a 3-D object to a 2-D or 1-D object.
Aliens would not care about some local religion or what some book said was supposed to happen. Aliens would see neutron star density stuff as child’s play.