Here's my problem. We know the magnetic force is just F=q(v x B). If we have a stationary charged particle in a magnetic field, it will not feel a force. If we change to a moving frame, the particle now has a velocity, but the idea that it feels a force by changing frames is ridiculous so Einstein invents special relativity. My question is, is that really necessary? The magnetic field now also appears to be moving, so the difference in speeds between it and the particle is still zero, hence no need yet to move away from Galilean relativity. Is my thinking correct or am I missing something?