James Delingpole says:
This is why so much of the left-liberal ‘argument’ has to do with raw emotion rather than logic; it’s why they’ll almost never engage with us on detail, preferring simply to use what Vox Day calls “point and shriek” tactics, or to try to belittle and demean us with emotive (but meaningless) pejoratives like “racist”, “homophobe”, “misogynist”, “Islamophobe”, “climate change denier.”
They have been using these techniques very successfully for years and in my experience there is only one effective way of dealing with this: you have to show their workings. You have to notice what they are doing and then you have to explain to other people what they are doing.