Does barbell strength training & kettlebell conditioning go together?

Tried crossfit for a lil bit and just saw the 2014 Crossfit Games...my left knee was in pain bc I saw some poor form on the deadlifts and cleans. Concluded that I will see some new injuries if I continue with the program.

Think going back to basics like in high school (powerlifting and Olympic lifting teams) will be a good start but I do like kettlebells too. Does anyone here mix it up with both BBs and KBs?

Thanks,
Anthony