I'm not being argumentative, however why would the disciples spend the rest of their lives being imprisoned, tortured and eventually martyred if all they witnessed was a badly beaten and certainly sickly looking man who survived a crucifiction? Or why would these men give up their lives preaching that Christ rose from the dead if they indeed stole the body? Coming from a Jewish background they would know that they have no hope in this life or the life to come, with no riches and having to give up everything they knew. The martydom of the disciples is a well substantiated historical fact.
As for the sacrifices the believers went through, if that proves a religion's veracity then we'd all better convert to Scientology. Scientologist go through a lot, though most of the really nasty stuff they deal with comes from their BS "church". True believers make sacrifices, that's what they do, if it wasn't for true believers making sacrifices we wouldn't have a nation.