The LORD of the Vineyard

Why are there tares? Who were these ‘cultivators’ that were supposed to take care of the vineyard? How was their main interest the authority that they thought they deserved from the position they were in? Why did they beat the servants of the LORD? Who are those that get upset at the preaching of Christ? What does every parable in Scripture have to do with? Who is the Heir and what does He inherit? Who are those the LORD will say He never knew? Why must Christ ALWAYS get ALL the glory?