@Lunar270 You're obviously not obliged to respond but I'm genuinely interested in understanding why antisemitism is so rife, as you say .
I think to really understand you have to first understand the history of Europe. In Europe Jews were the first and for many, many years virtually the only identified minority (in some places there were also Roma (Gypsies) - who were also badly persecuted - including by Hitler).
And in the feudal society that made up Europe - there were the wealthy landed aristocrats, and the poor serfs who worked their land - and then there were the Jews - who were generally not allowed to own land or work it. In addition, the Church forbad Christians to lend money at interest. However the reality of the world is that economies struggle to run if there is no borrowing (the UK government could not continue to fund most of its services, for a start, and most of you who own houses, would not do so if there were no mortgages). So one of the relatively few "jobs" that Jews were allowed to do was to deal with/lend money (there were others, such as shopkeepers and tailors and innkeepers - so long as they didn't own the inn or similar). So while not all Jews were bankers/money lenders - the Christian Church required that all bankers/money lenders be Jewish. This was also great for the aristocracy - because if they borrowed money and squandered it (the serfs were too poor to borrow money), they could always arrange a pogrom, get the Church to whip up the emotions of the serfs in Church about the wicked Jews who killed Jesus - allow them to go murder a few, step in heroically and kick all the Jews out of the local area - and as part of that, it meant they never had to repay their loan, as all the Jews were gone (also focussing the serfs anger at their lot on the Jews and then allowing pogroms meant the aristocracy was not touched). And the Jews would need to move to the next kingdom, where they would have to set up again (the shopkeepers, tailors etc and the money lenders). But of course the feudal society couldn't survive without Jews without generating a middle class that would threaten the aristocracy - and because they couldn't get a loan anywhere etc, so in a few years they would start inviting the Jews who had been kicked out of a back.
Once the limitations on non-Jews engaging in money lending and getting into commerce were relaxed - eg Venice - the new non-Jewish middle class made sure there was no competition by locking up the Jews in the ghetto (the Venice ghetto was the very first of these). This was the history of Europe for at least 600-800 years (more in eastern Europe, where feudalism continued for longer). In England of course, Jews were thrown out in the 12th century - one of the reasons almost certainly that England developed its own, properly protected, commercial and financial sector - because you couldn't treat Christian Englishmen like you treated Jews.
That is, unfortunately, the history of Jew hatred in Europe (Jew hatred is a better term than anti-semitism, which was coined because it sounded nicer and less direct). And it is a long, long history - which culminated in the holocaust, but didn't start there - the holocaust didn't come out of nowhere.