Sean Longstaff has shared what he thinks Newcastle United did against Luton yesterday that ultimately cost them the three points. At 1-0 up after seven minutes thanks to Longstaff’s opener it looked like it was going to be another one of those games for Newcastle where they control the match from start to finish, but that was far from the truth. After the eight-goal thriller, Longstaff spoke to NUFCTV where he claimed that Newcastle were naïve after going 3-2 down and left themselves too exposed which ultimately resulted in Luton’s four goal. Longstaff says Newcastle’s defending was ‘naïve’ vs…