Self defense is increasingly difficult to use in court because leftists and leftist activist judges don't believe in it.

Nor do they believe in any of the other core underpinnings of Common Law, such as juries, they just liked to thump precedent when they have been setting the precedent. But when they hadn't set those precedents they were not so keen on them. The court precedent striking down laws against dual citizenship was made only a couple of years after another supreme court precedent upholding bans on dual citizenship, because the Warren court had gained a leftist majority in that time.