Is the lone star tick that is responsible for the alpha-gal allergy to red meat and is a vector for multiple viruses, yet another extraterrestrial-introduced pest intended to plague humans?

This indeed is the case, and again shows their depravity. Not content with simply bleeding society dry, and infesting humans with multiple diseases that can be quite devastating, they have, in addition, unleashed a number of true pests and hope to study them from a safe vantage point and learn from what happens how best to vary the organisms present, and the vectors themselves, in some cases.