I am fan of X-men movies, but specially, I like X-men: First generation because it shows when Xavier professor and Magneto were children. Xavier was a boy who lived in a big house, a day Mystique, who was a girl that could change her appearance for anyone, arrived at his home searching food like Xavier's mom. He discovered her and allowed her to stay. 

At the same time, Magneto was a Jewish boy who lived during the Second World, his mother was killed for a german called Sebastian Shaw to Magneto shows his power, which was to handle the metal. 

Years later, Magneto and Xavier met when Magneto tried killing to Sebastian Show. In the meantime, Sebastian Show tried exterminating the world, causing war between USA and Rusia.