They learned from their experiences. Taking power slowly and gradually means there is less resistance. If nazi germany had been slower going into extermination mode europe probably would have just sat back and let it happen. If they waited a bit longer to invade france and sent some time making baseless accusations to justify their war the rest of europe probably wouldn’t have cared. If they had exercised more soft power on britain and the usa they could have probably gotten their support.

The trick here is to know that precursors to overt Fascism occurs is only obvious but hidden from the news. The Nazi Death Camps are modelled after the so-called Indian Residential Schools where Indigenous children are being enslaved, experimented on, tortured, and murdered since the 1850s. The fake school genocide might also be continuing to the present in secret. The Nazi Concentration Camps are imitation of the Federal Reserve concentration camps in the British diaspora that are still continuing. In fact, the British emigrant governments still continues the planned starvation, planned chemical attacks, planned illegal occupation by European immigrant corporations, and planned raids by European immigrant rapists against Indigenous people in the concentration camps.

The current economic sanctions and threats of annexation by Trump against a fellow British diaspora country is the same aggressions that the Western Europeans and British diaspora had been commiting against former European colonies and successful countries founded by people of color. The difference from the typical aggression by Pax Americana is that Trump is directing the aggression against a rich stable country of Western European diaspora and commiting it openly.

The current exploitation of vulnerable refugees and foreign students by the Western European diasproa are a continuation of the exploitation against their Indigenous population to some extent.