That’s not true. I see that posted here all the time. Their philosophies may have had some similarities, they may all have been collectivists, but the NSDAP and the communists were bitter, bitter enemies.
But they are not polar opposites and conservatives are not Nazi’s.
Because they were rivals, socialist vs communist. Both were totally bad, but close enough to be similar. Which I’m sure you know of course.
But the modern lie that Nazi means somehow “right wing” (whatever the he!! “right wing” means anyway).