No, you are not wrong at all. In fact the opposite, as you are as right as one can be. You are a member on this forum, and then already have experience. You know it´s not prejudice or ignorance. Everyday we get first hand experience by reading about how much most members see all as wrong in Thailand, and how much problems they have understanding and accepting the people of the country where they chose to relocate.
I totally share your view, and I have not moved to another country to engage in communities of people that I moved away from. There are plenty of good Thai´s that have much to offer and are able to have great conversations as well as a lot of fun. What is the fun in meeting all the grumpy and sad as well as lost people you read from everyday?
Yes, I have attended. Actually gave it 2 chances as I though I might have been wrong. I wasn´t! So, now it will never happen again. It´s enough to 1 time a year stand the New Year dinner buffet, that usually is full of clueless foreigners in a country they say they love but don´t understand.
It´s not pre-judging. We get the unhealthy dose of foreign intelligence and believes every single day on this forum.