If the neighbor's tortures are not bearable and beyond tolerance, you may first issue a legal notice to him to restrain from indulging in such criminal activities against you including posing threats. If at all he has any relief to be claimed, he may approach court of law and not to take law into his hands.
If he is not listening or still continue to do those acts despite this legal notice, you may file a suit for mandatory injunction against him to restrain him from interfering into your peaceful possession and enjoyment of the property with an application for an ad-interim injunction on the same lines till the disposal of the suit. This will make him to run from pillar to post or to compromise with you for his easement pathway for access to his lands.