No one would dispute that hatred towards Jews existed for 1000s of years, but I think you're mincing words here and being somewhat uncharitable. The kind of anti-Semitism that was based on an innate racial inferiority rather than based on religion and culture was very much a 19th century development and it was that specific form of hatred towards Jews that was widespread across Europe and America rather than an opposition towards Jewish customs and beliefs.

Indeed the term "anti-Semitism" was coined to reflect the shift in hatred towards Jews from one rooted in culture and religion to one root in race. The very fact that you acknowledge that pogroms prior to the 19th century were not based on race suggests that if you had just taken the time to actually understand what was being said you could have avoided your confusion.