If you had a real problem coming your way, nobody could fault you for whatever drastic action you took to prevent it from spreading. Since you haven't come up with one, let me. If an exotic aphid species that carried a virus that destroyed the root stock of Florida citrus trees was headed your way, or had been found in an area as small and as few in number as the Mexican redrumps were, drastic action would be required. The actions might not be popular, but they would need to be taken. The aphids are oranges.
Tarantulas are apples.
You never had a leg to stand on. The ATS requests immediate removal of all laws restricting the ownership of any tarantula genus or species in Florida.