Prager wrote a definitive book about the whys of anti-sem.
“Dennis Prager (born August 2, 1948) is an American syndicated radio talk show host, syndicated ... Why the Jews? The Reason for Antisemitism (with Joseph Telushkin) (2003) ISBN 0-7432”
In a nutshell, much of it comes from them being The Chosen People.
It must be hard being the favored race of God.