One of the alleged Jersey boy jihadis charged with attempting to provide support to ISIS after ranting about beheading infidels and attacking Jews was once an aspiring football prospect at a posh Catholic high school in Manhattan. Tomas Kaan Jimenez-Guzel, 19, who was arrested on Nov. 4 at Newark Airport while trying to flee to Turkey, attended Chelsea’s $26,460-a-year Xavier High School for freshman year before transferring to Montclair High School where he studied alongside Milo Sedarat , who