That statement would make more sense if you framed it correctly - "they're not immature their
opinion is" See ? By using the multiple, you make it seem as if each and every opinion they have is deemed immature by me. I call this particular opinion immature, and for some reason now you have fun making it seem as if I consider every opinion they have as immature. There's your problem right there, Mr High horse.
By the way, you might want to read through your initial posts on the forum before climbing onto that high horse of yours. The absurdity of you pulling all that stuff and now having a go at someone for something he's clearly apologised for.