They’re already causing a genocide towards Badgers for “environment/health” reasons and it’s done fuck all, except to harm badgers more and its population.
Yes, grey squirrels are invasive to red squirrels, but that’s cuz they’re stronger genetically than red ones, so it’s not exactly you can do much, cuz it’s in their genes.
Best thing to do is protect red squirrels and actually grow a population of them in a safe environment so they are not at risk of extinction. These conservation efforts have proven time again to be effective for this, whilst not causing harm to other populations of species as well.
Life when you start becoming a privacy/foss enthusiast ;-;