Dutch left is going through this now. Everyone right of the center party Green/Labor is a racist and everyone left of them is a traitor. People who get caught up in the right wing web of lies are called racist, dumb, stupid, whatever. It's like they expect everyone to somehow end up on the left side of the spectrum without doing any outreach and while calling everyone who disagrees with them names. Meanwhile the far right welcomes these people with open arms while explaining how a brown refugee is responsible for Shell not paying taxes on their 36 billion euro profit.
Get off your high horse. Reach out to the people. Be nice to them and never stop explaining.