shouldn't have killed [J]esus
How was
this particular fellow involved in that
state execution?

sins of the father. that
the jews collectively as a people have a lot to answer for is a truth almost universally understood outside american christian zionist circles. instead of going around calling the rest of the world mentally ill for disliking them let them ask themselves what they have done to be disliked and do something to redeem themselves.
(Red colorization mine.)
Your post
does not elucidate how he
personally effected, supposedly, an execution carried out more than one thousand nine hundred Julian years
prior his own birth by a
pagan government.