Free Will is an Illusion, So What?

"Think of someone that you dislike. Let’s call this person X. Now, imagine that you were born with X’s “genetic material.” That is, imagine that you had X’s looks, body odor, inherent tastes, intelligence, aptitudes, etc. Imagine, further, that you had X’s upbringing and life-experiences as well; so, imagine that you had X’s parents growing up, and that you grew up in the same country, city, and neighborhood in which X grew up, etc. Would behave any differently from how X behaves?"