I told you. Post death hallucinations are far more plausible. They are frequent enough so that peer reviewed studies have been done on them:
People who have suffered the loss of a loved one may subsequently report sensory experiences of the deceased (termed ‘after-death communications’, or ADCs). Such encounters are common and can be a source of comfort to the bereaved. Nevertheless, ...
www.ncbi.nlm.nih.gov
" These often occurred over many years, and at the time of the interviews 106 people (36.1% of the sample) were still having them. The form of encounter varied, most commonly taking the form of a ‘sense of presence’ of the deceased (reported in 39.2% of cases), but also including visual (14.0%), auditory (13.3%) and tactile (2.7%) experiences. A majority of those reporting encounters with their deceased spouse regarded them as helpful in their recovery from loss, and Rees concluded that these hallucinations were normal and beneficial accompaniments of widowhood."
How many cases of resurrection do you know of? Especially after a very efficient state execution. They badly lose the "plausibility" argument. Post death hallucinations are not rare.
As to what people believed some time after Jesus's death, so what? You are probably too young to remember the death of Elvis. You may not have not even been born when that happened. After he died there were countless Elvis sightings. People saw him talked to him and touched him. Often he was seen working in the kitchens of fast food joints. A whole series of jokes arose because of that.
I am not denying that Jesus existed, but his resurrection looks to be pure legend.