“Neither is citing the beis yosef about an ashkenazi minhag”
The Beis Yosef is citing Rabbeinu Yerucham. Everyone agrees that that has halachic weight with regards to whether one can eat kitnios. The issue of contention is whether it has more halachic weight then the current ashkenazi custom and those who endorsed it. You (and most Poskim) feel that it does not; R’ Bar-Hayim apparently feels that it does.