To attack him effectively, you have to go after the things that people like about him. You have to flip his brand.
So don’t tell people that he doesn’t know the difference between Kurds and the Quds Force. (They don’t either!) Tell people that he isn’t the incredible self-made genius that he plays on TV. Tell them about all the money he inherited from his daddy. Tell them about the bailouts that saved him from ruin. Tell them about all his cratered companies. Then find people who suffered from those fiascos — workers laid off following his bankruptcies, homeowners who bought through Trump Mortgage, people who ponied up for sham degrees from Trump University.
Or just take a camera crew around Atlantic City, and slap Trump’s name on what you find.
Likewise, don’t get mired in philosophical arguments about big government and crony capitalism. Find the people hurt by Trump’s attempts to exploit eminent domain: The widow whose boarding house he wanted to demolish to make room for a limo parking lot, the small businessmen whose livelihoods he wanted to redevelop out of existence.