The working class can and must be engaged by ideas and policies that might actually help them. A majority will reject them off-hand because GOP identity politics works most strongly on them, but you will plant seeds of doubt in some folks. Leaving wrong ideas unchecked and otherized hasn’t gotten our society any lasting change, it’s just led to our current issues. Societies and cultures don’t get better because you call someone an idiot or a racist. I’m not saying everyone should engage everyone who supports politicians with backwards, dangerous, fascist viewpoints, but if they only ever hear the other side hurling insults at them, they’re gonna double the fuck down on their support of fascists.