Simplify the following text for a Grade 12 native English-speaking person.
Original: Finally , Hitler used the purge to go against conservative critics of his regime , especially those loyal to Vice-Chancellor Franz von Papen , and to settle scores with old enemies , such as Kurt von Schleicher .
Simplified: Finally , Hitler used the purge to attack or eliminate critics of his regime , especially those loyal to Vice-Chancellor Franz von Papen , and to settle scores with old enemies .