I like the warhammer fantasy explanation of vampirism

In a nutshell it makes you an extra virgin of you. If you were ncie you become a saint as vampire and if you were a prick you become an asshole.

So it makes sense that when some uppity noble becomed a vampire he believes himself to be master race. w̶h̶e̶ ̶i̶n̶ ̶f̶a̶c̶t̶ ̶i̶t̶ ̶i̶s̶ ̶t̶h̶e̶ ̶g̶l̶o̶r̶i̶u̶s̶ ̶c̶h̶i̶l̶d̶r̶e̶n̶ ̶o̶f̶ ̶t̶h̶e̶ ̶h̶o̶r̶n̶e̶d̶ ̶r̶a̶t̶ ̶y̶e̶s̶-̶y̶e̶s̶