@Discovereads
No. Not Intimidation. No, because you can be assertive without verbally abusing someone.
Arguably asking about the sign was inappropriate behaviour. It certainly was if he was planning on challenging her on her political beliefs in her own home. But I'll give him the benefit of the doubt.
Arguing about politics on her property. A massive no, and Waitrose should discipline him and re-train him. Talking like he did about her daughter. Refusing to leave immediately. Worse again.
We don't know whether this was doorstep, but I expect it was inside. It doesn't really matter but KJK is even more justified if it happened in her house.
Either way he had done at least three things that lost him all right to be treated with respect. Customers are not obliged to be professional, that's the employee's job. Customers are obliged to treat staff with respect, but not after the employee has behaved deeply inappropriately.
We also only know one side, other than it is certain KJK expressed her views and used swear words to ask him to leave. There is no point debating the story unless we trust KJKs account. Obviously if the truth turns out to be different then we'll have to re-appraise, but I have no reason to doubt her.
She should have complained about him immediately if her account is true. How might he be with other customers?