Leftists see Christians and Jews as undesirables and that is because anti-Christian atheist leftists are under the influence of their father the devil.
John 8:44
Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
i don't know any "leftist" who thinks that, but i'm sure there are some. many "leftists" are, in fact, christians. duh
they don't want christians putting their beliefs into laws, which of course they shouldn't anyway