This is a distinction without a difference, but while he's perfectly comfortable courting Nazis with words and actions aligned with their views, I don't think he's ideologically a Nazi.
He's clearly fascinated with Hitler, and has probably read parts of Mein Kampf, and has almost definitely read speeches like the Reichstag address, but I'm not sure I believe he's read the whole thing (not that that would indicate much in isolation), and I think the idea that he'd have it as a permanent fixture on his bedside table is laughable.
I can't find evidence of him quoting Mein Kampf (feel free to prove otherwise), but he certainly uses Nazi terms.
I'm not one for sins of the father - this is a super-weak point to raise. Fred was unquestionably a racist piece of shit though, and it's very plausible (though unconfirmed) he was a Nazi.
I think Trump is a racist fascist that has an understandable fascination with historically effective populist fascist rhetoric, who relishes the positive attention he gets from Nazis, but I think he's too self absorbed to be ideologically Nazi. This changes nothing though - his policy and rhetoric doesn't change based on whether or not he's an actual Nazi, or just functionally near-indistinguishable from one.