What do you want to know?
First of all, PEGIDA is a group that worries about the Islamization of Europe in general, and of Germany in particular. Since October, they organize weekly demonstrations in the city of Dresden, to demonstrate against the current European and German policies for immigration.
This being Germany, most of the big political parties are judging theam as right-wing, racist, even neo-nazi, while many sociologists and other people simply view them as very conservative.
Of course, it is true that these demonstrations do attract the right-wing element.
In essence, PEGIDA's goal is to protect Christian-Jewish European culture against influences from immigrated minorities, especially Muslims. They want to tighten the immigration laws, of course stating that refugees from war and political/religious presecution must still be allowed. They want to enforce a better integration of immigrants. They want zero tolerance against delinquent immigrants. They position themselves against radicalism of any form, religious or political, and against any form of religious fundamentalism.
About the part of the article you quoted where they say that "many people would join if there was a demonstration in their city", it has to be said that there actually have been PEGIDA demonstrations in other cities - but to these, only a few hundred people attended.
Actually, in these cities the counter-demonstrations attracted much more people than the actual event.
In my personal opinion, their populist statements attract a great deal of people, especially when keeping in mind that there is a big Muslim minority in Germany, and that in the media, you never hear about the "good" ones, but only about the "bad" ones.
However, over the last weeks, the tone of their speeches has become increasingly aggressive - and of course, many right-wing organizations are happily joining the demonstrations to get public attention.