the story of my argument with einstein

Does "e = m X c squared" have any real meaning?
Is it simply an untestable mathematical fanstasy?
Is it in any way coherent?
Ascribing notional numerical value to notional quantities of energy and then ascribing similar numbers to mass and then multiplying the notional quantity for mass by a notional quantity for the notional speed of light and then equating both resultant numbers for energy and mass with an equals sign, and calling it an equation, is like making sheep dogs equal to the colour blue.
It is not coherent.
It is not testable.
And it probably isn't true.
Of course we can make mass equal to energy by inducing notional values to both and imagining a speed for light, and then performing some hokum with a maths equation and then introducing a Universal Constant if needed which we have made up out of our heads when the equation doesn't balance anyway.
And we can equate sheep dogs to blue with similar mathematical hocus pocus, ascribing numbers to genetics and numbers to spatial dynamics and numbers to light waves under the guise of notional frequencies such as we imagine them to be, and then a universal constant for tails since all dogs have tails, and then a few parametric equations and a nifty new extra Universal Constant wherever things don't add up, throw a dead cat over your shoulder in a graveyard at midnight and hey presto "Sheepdogs = Blue X C to the power of a lamp post when the moon is full."