Ult.William Str.Jr

2

(Universe 1610 also designated as Original Ultimate Comics Universe) You (who ever) stumbled into a meeting were Mutant haters gathered and on stage was there leader William Striker Jr. Fitted with his Sentinel Armour

Ul.William Striker

5

(Ultimatum Event) William Striker Jr didn't hate Mutants to begin with but everything changed once his Apartment got flooded by the Titel wave that Magneto created, killing his wife and child in the process, after that he renounced being a priest and teamed up with civilians with similar experiences to attack the Xavier school directly with Sentinel technology. PS your a mutant in this scenario, the Og X men team is not there and Xavier was already killed by Magneto (This takes place in the Original Ultimate Universe also designated as 1610)