YOU ARE NOT THE GUY!
and, wtf was Walts 'genius' motive at the dinner party anyway?
Walt has always craved the credit his chemistry deserves. He didn't like the idea of Hank giving Gale the credit for the blue meth when it was his invention when he knew he was a better chemist than Gale. His pride in his work has pretty much set the collision course for his downfall. This has always been bubbling at the surface. From my perspective Walt resents never following through with his chemistry and is using meth production as a way of finally getting recognition for the brilliant mind he is. He simply doesn't care right now that it's illegal. The recognition of making the best meth ever is more important.
By the way, here's an interesting perspective. There's a book called "If it's purple someone's going to die". It's a concept that color represents a lot in visual story telling. Purple is often used by cinematographers and producers to convey death. If you all noticed when Walt was pouring the wine in Hanks kitchen, everything around him was purple. I don't think this was at all in unintentional as it's just to obvious. I think a lead character is going to die at the end of this season.
Finally just my perspective on Jessie and Gus's motives. I think Gus would prefer Walt out of the picture and sees him more of a liability than Jessie, despite Jessies drug problems. I think his set in motion Jessie to take over from Walt as the lead.