I suppose a better question for the mentally deficient and intellectually challenged would be whether they're connected with the reasons why that definition is unfair, wrong and anti-semitic?
Certainly not all Christians fall into that mold. From my perspective, it's primarily an affliction of JW's and kindred groups
Define pharisee as an adjective is not a problem of JW's and kindred groups, and for the record I do not consider myself a defender of the JW.
Simply, several dictionaries support the use of this word to describe a hypocritically self-righteous person and none of these dictionaries, to my knowledge, are produced by the WT or any other religious group. Same with "Judas". Biblically one was half brother of Jesus and the other a traitor. Hardly, if a person call another to be a Judas, would think of the half-brother of Jesus.
What is a problem is when someone starts to see "anti-Semitism" in any comment.