Because it's not working, and it's hanging by a thread. They don't care about the power they have over our society (which they hate with a burning passion), that would never be enough for them because it's not their true goal. They will keep pushing for the absolute checkmate at all costs until the bitter end when we defeat them. They have no choice in the matter, and even if they did have a choice, they probably would still keep going because they hate seeing the ones they call their "cattle" even daring to say they are free in any capacity rather than kissing their ugly jewish feet and worshiping them as false Gods. It's offensive to them that we ever even tried to resist their oppressive rule and create another society away from them.
You remember the abusive serf factories called churches that were running at max power in the middle ages with mandatory attendance, right?
Well, they want to be doing that to all humans of all races across the entire planet, except full blown communism without the religious pretense, and of course much, much worse. Worst nightmares amplified exponentially.
This is easier for them to achieve if the White race has been race mixed to oblivion in order to generate an inferior mixed race. This has been done on other planets which resulted in the end product of the greys, the final step being the brain microchip. The jews are just following the tried and true script from their alien progenitors for enslaving worlds and species.
For another part of your question, it's because us Whites are too risky for them to leave unchecked. We have proven time and time again, age after age, that when the jews push too far and our backs are up against the wall, we fight and we bring the whole jewish agenda crashing down. Then we live in peace for a little while before the jews try again with our descendants. The only thing stopping another leader from stepping up and taking back the reigns of power like in Nazi Germany, is their retarded myth of the holocaust which they use as a silencing hammer to shut down any criticism of them and evoke pity and sympathy from brainwashed fools who don't question anything they were taught in school by feckless morons who comply with teaching marxism for dirt pay, probably because they are crypto kikes in many cases or otherwise just stupid. They use this myth as a shield and a weapon to oppress us. As soon as the masses stop buying it, it's game over. That's why they are trying to crash the economy and bring down countries, start a war, etc... so that we can't focus on delivering justice. People are waking up, and the jews are terrified.
Also, we are the descendants of Satan whom they name as their main enemy. Doesn't that make it obvious?