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Lol, taking it out of context really. The reason behind the night of the long knives was to destroy his competition in the Nazi party. The Nazi party was founded on far left, socialist ideology.

Hitler killed key members in the SA, which was a lot bigger and broader than his Nazi SS. This was to make sure nobody could threaten his power. It had nothing to do with the fact they shared an ideology.

I suggest reading more history because your understanding appears limited.