This was the message of multiculturalism: to prefer one’s own people to alien enemies is thoughtcrime.
To the contrary, multiculturalism is the practice of learning to appreciate different cultures so we can all live in peace.
To glorify Christendom for its triumphs is thoughtcrime.
To glorify Christendom without giving equal attention to its many bloody horrors would be a thoughtcrime.
... to love Nazi Germany for her ruthless Germanic strength
No one should love Nazi Germany. It was an abomination among nations, a bloody stain upon history that can't be whitewashed away. Anyone who praises it should be considered an enemy of humanity.