[HaremShaih]

I don't profess to be a tough guy, but if any foreigner insults my country expecting me to back down and agree I'll let him know I most certainly do not agree. There is so much anti-Britishness and most British people whole heartedly agree with it. I can't imagine the Turks, Polish or Americans tolerating the insults that the UK gets.

My main problem is, if you defend yourself against a tirade of abuse from a foreigner, you're likely to find another Brit accusing YOU of being racist and culturally incensive.
However, it's now a new thing, British self-hatred has existed for quite some time, although I don't like George Orwell for obvious reasons, I will quote him to better explain what I mean:

In left-wing circles it is always always felt that there is something slightly disgraceful in being an Englishman and that it is a duty to snigger at every English institution, from horse racing to suet puddings. It is a strange fact, but it is unquestionably true, that almost any English intellectual would feel more ashamed of standing to attention during 'God save the King' than of stealing from a poor box Orwell wrote that in the early 1900s, and the attitude if just as prevalent, if not more prevalent today. Foreigners can freely insult you for being British, but if you defend yourself you are an insensitive, racist evil Brit. If a Southern European calls British drunken scum, most British people would whole-heartedly agree, I can't imagine the Turks, Spanish or French agreeing to a similar insult.