It is my belief that children of conservative or repressive parents are more likely to commit harm or violence, especially via gun. Conservative households tend to have at least one gun on the premises. The children of these households are taught inappropriate coping mechanisms for their emotions, ranging from screaming, running, hitting pillows, or even going to shooting ranges. When you learn that violence is an option to cope, you eventually turn to violence as a way to deal with reality.
No, children of conservative parents are not more likely to engage in gun violence, because the shooter in California the week before was very liberal. Many of the shooters are very liberal. The person who shot Kennedy was a communist. Usually, the shooter has a mental health issue, rather than extreme politics.
While conservatives are generally assumed to have a more accepting approach to gun ownership, and therefore their children may have an easier access to guns, the political sidings of their parents do not determine whether they will end up perpetrators of gun crime. There are many factors, including upbringing, that mean that overall anyone from any background could find access to a gun end up shooting someone. Blaming groups does nothing, solutions need to be sought.
A person will act violent regardless of the beliefs of their parents. Acting violent is a decision you make for yourself. The beliefs of another have nothing to do with how you act. A person that wants to hurt others will do so. It is a mental illness, not a political stance.