No argument there but this antisemitism has been going on for well over a century, maybe longer. Surely the populations of countries don’t just jump on a bandwagon. Where does it stem from?
Lots of forms that come down to a bunch of common themes.
They are the original 'other' who have historically both refused to capitulate and be absorbed by the great powers of history and who were scattered across Europe long before any other 'outsiders'. They thus trigger both left and right wing pathologies in different ways.
Excluded from most professions in medieval Christendom where they were persecuted for religious reasons - 'Christ killers' who originally persecuted Christians till the boot went on the other foot - they took up 'middlemen' roles in trade and finance. Especially so with the latter which Christians themselves were excluded from due to views on usury.
In this, along with otherness, the seeds were sown for secular racialised hatred of the Jews, as promoted by Marx and others, which superseded a thankfully much faded Christian anti Judaism.
They are not alone in this: 'middlemen' minorities are persecuted around the world and mass slaughter tends to come from 'punching up' not 'punching down'.
Ironically, further ingredients come from some Jews siding with politics they saw as shielding them from their historical persecuters - eg adopting socialism in the face of nationalist persecution - and ended up with both sides of loonies hating them.
Whether, as individuals, preferring capitalism or communism, they do disproportionately well, as in science and other things. This is probably because they are are smarter (Ashkenazi anyway, who along with east Asians average higher IQs than the rest of us) and more resourceful (which history has forced them to be). Jews have also been in the vanguard of atheism and social liberalism (also with historical roots but will skip for the sake of length) . Again, anything they take to they tend to do well at, so this has also pissed off some forms of conservatives.
They also bugger up the mad theories of various groups by succeeding as a minority in the face of racism and doing better than the majority population. This pisses off nationalist views of their own supremacy and collapses the main foundations of woke and other forms of leftism.
Conspiracy based ideologies like leftism and forms of the far right also need an explanation for their crackpot ideas relentlessly failing, which requires scheming spoilers. This can be whiteness, bankers or whatever, but in the end needs a small enough, distinct enough, successful enough, and other enough group as the real bogeyman: step forward the Jews.
So if those are the patterns, some specifics:
Romans and other empires hated Jews for refusing to submit to imperial domination (the left inherited this form)
Pagans hated them for introducing morality that countered the pursuit of selfish appetites (the left and far right inherit this form)
Christians hated them as Christ killers
Regimes in Christendom hated being their debtors, due to circumstances of their own creation, and manipulated religious prejudice to launch pogroms against them
Nationalists hate them for being outside the volk, too succesful with it, for being communists and capitalists and having outside loyalties (the latter also directed at Catholics in protestant countries). The extreme right also hate then for being the seedbed of Christianity.
Swap being outside the volk for refusing assimilation into the deracinated blob and drop the communist bit, and the left hate them for the exact same reasons. Especially racist forms of the left, such as woke, whose ideas they skewer by their very existence.
So they are hated for their religion and for being Godless, for being capitalists and communists, for imposing contraints on our lusts and for tearing down those contraints, for being rootless Internationals and zionist nationalists. Left and extreme right politics are manifestations of resentment and jealousy, which along with suspicion of the other, are permanent parts of the human condition, and so there will always be plenty of bile filled failures ready to tap into these hatreds.
Sorry for the length but you asked a big question, and I've not even got to Islamic hatreds. But they are very similar: refusal to assimilate into the ummah (which applies to every one else but with particular historical significance and the jews a manageable size for focus), for secularism, and socialism, and capitalism. And seething resentment that they have turned the most unpromising strip of 'Arab soil' into a thriving country which begs deeply uncomfortable questions as to why Islam can only produce shit-shows