Yes you're right not all Chinese people are thieves, but I know that SOME of Chinese produced stuff isn't an original idea, or they cut corners, and have terrible quality control. And the best way for me not to unknowingly support either wrong doings is to not buy it...period. A small few ruin it for the rest IMHO.
I would think that the best way to not support ripoffs is to not buy items that are ripoffs, rather than boycott the entire country. But, hey, that's just me.