God makes some hardhearted and that is a sign of grace.

Romans11:25.  now that is grace.  for if it weren't for the chosen one's hardness of heart, we wouldn't be included.  And this applies to why Jesus hasn't come yet.  There must be a full ingathering. 

Who do we need to invite to the feast?

If you are wondering why Jesus hasn't come quickly, then are you asking others. 

If Jesus was looking over my shoulder, would He say I better work on my plank-blindness again.