why does rev paris have alot of enemeies

In the play, there are a couple of reasons why the Reverend Samuel Parris has many enemies. First, he is backed by the Putnams, and, as one can see from the discussions that occur during act 1, the Putnams are not a popular family. Mr. Putnam conflicts with John Proctor and Giles Corey, while his wife conflicts with Rebecca Nurse. The fact that Reverend Parris is seen as allies with the Putnams does not work in his favor.
Further, John Proctor points out another issue that he has—and others may have as well—with Parris: the subject of his sermons.  Apparently the minister frequently preaches "hellfire and bloody damnation" in Sunday services, and Proctor says this makes him not even want to go to church.
Finally, there seems to be a discrepancy about Parris's salary: he believes he is entitled to sixty-six pounds a year plus firewood and Proctor says the salary is sixty pounds per year plus six pounds to purchase firewood. Parris feels put upon and Proctor feels that he is trying to take advantage.  Moreover, Parris wants the deed to the house in which he lives, as a show of faith in him, and the others do not understand why he should demand something that no minister had before him.
Therefore, his political allies, his practices as a minister, and his apparent greediness makes Reverend Parris quite unpopular and makes him some enemies.