Of course not all Jews are bad, nobody is "all bad". I think even the most evil inhumane fuckup animals on this Earth, beyond even child-trafficking tier, even they still have some amount of good in them. 
The problem is, a large portion of Jews are bad. Zionism is bad. The Talmud is bad. The Jewish cabals are bad. The Jews have historically always been bad. They raise their children to be just as shitty as they are too, that or they have strong enough genetic memories that their race has a personality imprint stronger than others thus making the majority of Jews always vermin. 

But it could be a lot of other things too. Look at China: the Chinese who move away from there, escape there, and assimilate are almost always extremely good people who grow intelligent and respectable families. Over there though, they're nothing but mindless insects. 
Culture has more impact on what you are than genetics. They've built society into machines that work us without being aware of it ever existing or doing anything. 

If you want to look at how strong it is just compare America from the 90s to now. It hasn't even been 30 years and we're already so different from the us from pre-9/11. Niggers remain niggers because of nigger culture and lobster-bucket peer groups. Jews remain jews much for the same reason. Some good ones escape, some good ones go on to be good people and do good things, but the problem isn't the good ones; it's the bad ones.