No, it's not. Income is often used as a proxy for class, but it's not the same thing.
You also haven't done any work towards arguing against the fact that voters for Trump fundamentally don't live in areas with high immigrant populations or where their jobs were moved overseas. In other words the notion that Trump voters support immigration reform and trade protectionism because they have bad run-ins with our current policies on these issues.
Face it, Trump voters are bigots.