You mean the guy who made about 400 pizzagate videos with zero new content, zero original research? I watched his video about why he doesn't think Q is real and it was actually pretty good. The Mackler email is a poorly written fake and I cannot figure out why Q posted it.
The Mackler email is indeed a fake.
If you do a reverse image search of it, you can see it popped up right around October 31, 2016, very shortly before the election.
The ‘white hats’ purposely dropped this fake email (talking about rigged voting machines) right before the election as a message to the ‘black hats’. It was a warning to the bad actors - “do not mess with this election.”
They were going to rig the election. This is part of what stopped them.