BS”D
Gavra, are you referring to allegations that Yaakov deHaan HYD may have engaged in behavior that would have been chayav misso and that he continued this behavior after his return to Yiddishkeit and involvement with the Aguda? I thought you were referring to the murderer being subject to assassination by a Pinchas.
If so, there is one problem. For any Pinchas to kill him, said Pinchas would have had to be one of two witnesses to that behavior and indeed to one particular form of same.
The best indication we have of any of that is a poem which can be read as his having a very hard time controlling certain taavos. But no one has any evidence of his having committed a particular aveira in front of two witnesses, so he was not chayav misso at the hands of a human beis din.
Therefore, the rosho who killed him and perhaps the bigger rosho who ordered the hit (are those who hire hit men considered roitzchim or is only the murderer himself a rotzeach?) are the only one(s) who are chayavei misso.
Yaakov deHaan HYD died al kiddush Hashem, trying to save Jews. No one is perfect, and just as someone in Otisville is not excused from keeping Shabbos on the basis that he stole, so, too are we prohibited from taking the status of HYD away from Yaakov deHaan on the basis of some allegations of ossur behavior based on problems he had with that behavior during his non frum days.