Right - I know the passages (and had looked them up when you posted).
But what specifically brings you to the conclusion that Jesus told them to "buzz off"?
Both times (or 3, depending on how you count), Jesus simply described the lifestyle (so to speak) expected. There wasn't a "begone" among them. In 2 of the cases, Jesus specifically invited the applicant to "follow me."
Personally, how do you from "follow me" to "leave me alone"?
Again, not trying to be confrontational. (Probably not doing a good job at that!)
WHAT YOU WANNA FIGHT!!! HUH!!!!
Next time at a funeral, tell the grieving child to "let the dead bury the dead" and see how it goes over. It is overly harsh and hard. Look at the rich young ruler. Similar situation, but Jesus says, "look, here is what you have to do" and it is a much more gentle tone.