Actually the worst enemies of Muslims and Prophet Muhammad (PBUH) were Jews.
Certainly you will find the most violent of people in enmity for those who believe “the Jews” and those who are polytheists [5:82]
Jews are badly cursed in holy Quran :
And certainly Allah made a covenant with the children of Israel, and We raised up among them Twelve Caliphs; and Allah said: Surely I am with you; if you keep up prayer and pay the poor-rate and believe in My apostles and assist them and offer to Allah a goodly gift, I will most certainly cover your evil deeds, and I will most certainly cause you to enter into gardens beneath which rivers flow, but whoever disbelieves from among you after that, he indeed shall lose the right way. [5:12]
But on account of their breaking their covenant We cursed them and made their hearts hard; they changed our words from their right places and they neglected a portion of what they were reminded of; and you shall always discover treachery in them excepting a few of them; so pardon them and turn away; surely Allah loves those who do good (to others). [5:13]
Glory be to Him Who made His servant to go on a night from the Sacred Mosque (Kaaba) to the remote Mosque (Masjid al Aqsa) of which We have blessed the precincts, so that We may show to him some of Our signs in Mosque Masjid al Aqsa (Palestine); surely He is the Hearing, the Seeing. [17:1]
And We had made known to the children of Israel in the Book: Most certainly you will make mischief in the land twice, and most certainly you will behave insolent [17:4]
So when the promise for the first of the two came, We sent over you Our servants, of mighty prowess, so they went to and fro among the houses, and it was a promise to be accomplished. [17:5]
So when the second promise came (We raised another people) that they may bring you to grief and that they may enter the Mosque (Masjid al Aqsa) as they entered it the first time, and that they might destroy whatever they gained ascendancy over with utter destruction. [17:7]
It may be that your Lord will have mercy on you, and if you again return (to disobedience) We too will return (to punishment), and We have made hell a prison for the unbelievers. (Jews and their supporters) [17:8]