Bilateralist

1. A person who does not wish to choose sides, but remain in the middle ground.

2. A person who does not believe in the extreme sides, and always weighs the pros & cons and comes to the conclusion that everything should be in moderation.

3. Used to describe a person with neutrality or hesitance to choose between two sides in an argument or a competition, or inability to decide due to a lack of courage or other reasons

4. A person who is on neither side of the spectrum, but belongs somewhere in the middle.

5. A person who sees the world in shades of grey.

6. A person who sits on the fence (Idiom).

7. A pacifist.

8. A neutral person.

9. A mutual person.

Jason is a bilateralist. Because of his compromising habits & will to ditch or support two opposite parties simultaneously, he often becomes the target of both the opposing parties.