Why repel?

Change in dimension.

electric field is one dimension.

magnetic field is a different dimension.

when in phase form three dimensions;

when in phase they share an axis.

 

e- / e- is the same change in dimension. they repel.

because increasing proximity requires potential energy to become kinetic.

 

p+ / e-  opposite change in dimension. they attract.

because increasing proximity is an increase in equilibrium.