I hope the scientist don't try to destroy it and end up splitting it in two or something like that. Or push it closer instead of further away. Just let nature take it's course.
Unless it seems likely to hit and do great damage to Earth, why would they do any of that? And where would they get the money?
(Splitting or altering the orbit of a comet would cost at least millions, more likely billions, of dollars. They'd be more likely to send a probe to observe it up close, but even that may be cost-prohibitive at this late date. Space missions are planned decades in advance.)