Are meats that are possibly slaughtered unlawfully or by people other than the People of the Book considered impure, and does the ruling of impurity transfer from them to surfaces and tools they touch?

The cure for obsessive doubts (waswasa) is to ignore and disregard them, and to consult with mental health professionals, not by scrutinizing fatwas.

It is permissible to eat meat in the lands of the People of the Book, unless it is known with certainty that it was slaughtered in an unlawful manner.

One afflicted with obsessive doubts should adopt the easier and more lenient rulings, lest their doubts increase.

It is forbidden to eat the slaughtered animals of those other than the People of the Book, such as idolaters, because they are impure carrion.

What has been mentioned regarding the illusions of impurity transfer is a symptom of obsessive doubts, and the original state of things is purity.

It is permissible for you to adopt the easiest opinions regarding matters of impurity transfer, in consideration of obsessive doubts.