Crazy idea that popped up due to discussions on time travel and Senator McCarthy.
It had taken a very long time to set up.
Repeat, after repeat, after repeat of events, studying laws, precedents, and who was where, when, and why.
Repeatedly reviewing memories to see when they were alone.
And now, he had been lucky enough to end up back when he was four years old.
Time to take matters into his own hand, shake up the entire world, and get a laugh out of it.
The Dursleys' were easily taken care of. A couple of spells here, a couple of spells there, and given that their attitude fit, it was even easier to get them to attend the local meetings of the party he wanted them to be associated with. More than that, he had gotten them to sign documents, plan things that were never carried out, but kept, 'In Case the Order is Given', in a specially built secret safe well hidden on the property, with coded entries in their diaries that would be decipherable given the proper motivation.
Such as the government people who kept watch on the Dursleys' now. Nice how their treatment of him fit well into his plans of keeping him under the radar and as a freedom fighter. Even though the blasted blood wards that Dumbledore laid kept them from being prosecuted due to their treatment of him, Harry was using this as motivation for what he would do with Dumbledore himself.
Snape was the first Death Eater that he had gotten to. The number of time that he had been legilimenced by the bastard allowed him knowledge of the mans mind structure, and that was easy to redo, so that the man would play his part on the night in question.
From there, he was able to get to his targets, and more. The Weasley's, Fudge, The Malfoys, various people in Azkaban, the teaching staff at Hogwarts, and of course, the fools in the Wizengamot.
When Harry entered the Great Hall, and was called up, he paused before he sat down, and Minerva noticed his eyes glazing slightly. Suddenly, he turned, and his Hogwarts uniform became something she hadn't seen for a long time, and hoped never to see again. It brought back too many memories of the evil man could get into.
"HAIL, HEADMASTER DUMBLEDORE, LEADER OF THE FOURTH RIECH!" Harry shouted, his arm lifted in a salute, most found frightening and disgusting among the muggleborn. "As commanded, I am ready to take over as your General of the New SS!"
Snape stood up, as his clothing changed as well. "HAIL HEADMASTER, THE RIGHTFUL FUHER!"
The Students were in a panic, and a number of them quickly took out their wands. There was a flurry of spells sent at the three at the head table, most missing, but a couple of stunners getting through. With the flurry, a cutter just happened to come from Georges wand and hit the head of the defense professor, Quirell, which released Voldemort, causing even more panic.
In the end Aurors were called in, and the principals were questioned under Veritaserum. The news was not good. Especially for those in the government who had gone on with passing a number of laws.
It seems that the 'Boy Who Lived' had been made into what he was by the people raising him, with the help of Albus Dumbledore, who was continuing the Nazi Regime throughout the world. To do so, he used spells on various people, giving them to Voldemort in order to be killed since they opposed his will. The only ones he had not been able to do this to had been the Potters, Remus Lupin, and Sirius Black.
This led to an investigation of all the Death Eaters in question, and a number had spells which had been cast to ensure their loyalty, not only to Voldemort, but to the Headmaster's agenda.
These spells were being cleared up.
This, of course, led to the Dursleys' being investigated by the Muggle security forces, who just happened to find the plans, and a small store house of nuclear material, enough to create several bombs.
Harry, recovering from the 'brainwashing' and 'illegal spells' he had been under to turn him into a Nazi Officer smirked:
Take care of Dumbledore's greater good – Check.
Give Snape the recognition he wanted, as a person who willing went along with the Headbastard – Check.
Topple a corrupt wizarding government – Check.
Turn Death Eaters into reformists – Check.
Give the Dursleys' what they deserved – Check.
Ensure everyone knew that Voldemort could come back and researching why he hadn't really died – Check.
All because of spells that were no longer there. The real spells were all to 'process' peoples minds and memories, and were covered by other spells to change them back to normal. The second set of spells being detectable and removable. Maybe spending a long time in Spadau prison would finally teach him, his 'greater good' was not that great.
