Uhm, your modification is only a frantic of what actually is a race.
For a complete edit, you will have to do allot more than just a few edits.
In practical theory, let's take us human race against a snake.
Think to yourself, what can humans do that snakes can not, and vise versa.
Snakes can sail across water(some anyways) and bite their victim's and inject them with a venomous poison, either leaving them paralyzed or killing them.
Snakes also have heat vision, and an excellent smell of their surrounding, they also feel minute vibrations - Snakes in all, aren't intelligent.
Humans on the other hand, can walk, crawl and jump. Alternatively they can swim and use their hands.
Humans can also bite, and have a great biting power, they also have the ability to think on a much larger and deeper scale.
Humans also see in colour, we have smell, taste, felling and hearing as well.
Now tell me that a change in who can use weapons, will actually cover ALL of this.
Not to be harsh(again), but you cannot do this without proper research and planning, it simply isn't enough.