"We" know enough, evidently, to establish a church..... and you diminish THAT!? Wow.  Where did Jesus perform miracles: in time, in community, in practical reality that can be touched, felt, observed and reported.  
Intelligence sir, minimally can focus on i-n-c-a-r-n-a-t-i-o-n.  "When he was here"?  Why did he come?  And we are to ignore, dispise, retreat from? Come on.