When to parallel wires carrying currents in same direction $I\_1$ & $I\_2$. 

The MIT Physics Demo [Forces on a Current-Carrying Wire](http://www.youtube.com/watch?v=43AeuDvWc0k) this video demonstrates that effect.

My question is, why **exactly** does this happen? 

I know the reason, but I'm not convinced with it. One wire generates the magnetic field which is into the plane at another wire. Electrons are moving in the wire which experience Lorentz force $F = q(V \times B)$.

My arguments are, 

1. this force is experienced by the electrons, not the nucleus. And these electrons that are in motion are the "Free electrons". So, when the experience force just they alone should be drifted towards/away from the wire but not the entire atom(s).
2. The only force binding an electron to the material/matter is the coulombic attraction force from the nucleus. If the Lorentz force is sufficiently large, then it should be able to remove electrons from atoms. I other words, they should come out of the material.

But I never heard/read of any thing like that happening. Why doesn't this happen?

In any case, atoms must not experience any force, then why is it that entire wire is experiencing a force of $i(L \times B)$?