Are you insane?
Or do you think the Swedish politicians are?
For a start, that was a deportation, which is completely different - all countries have a fast way to send people back to their home country, even to refuse entry immediately, and the only way to avoid that is a believable asylum claim.
Assange is not a US citizen.
What do you think would happen to a politician found to have either signed off on or presided over a fast-track extradition to the USA for anybody, let alone Assange?
How many days would they survive after it became public?
They'd get the PM's "complete support" within hours, and be out on their ear within two days!
No matter what evil deeds you might ascribe to elected politicians, their first and foremost priority is keeping their job, followed closely by getting re-elected.
They only do this kind if thing if they think nobody is watching - and frankly, the longer Assange stays in that embassy, the more likely it is that everyone will forget about him.
On top of that, it's much easier for the US to extradite from the UK than from Sweden, if that had been the goal then the Swedes would have been asked not to serve their warrant and the US would have gone for him direct. They didn't, presumably because the US justice people don't think they have a case, no matter what their nutjob senators say to the hoi polloi.
It's also pretty certain that had he gone to Sweden in the first place, he'd be out or cleared by now and able to do whatever he felt like.
Instead he's feeding his persecution complex, and much as the ambassador might be enjoying poking two fingers up at the UK, they aren't going to let him stay there forever. Sooner or later it will fit their goals to throw him out, and then he'll be on a plane to Sweden, where he will now be refused bail and have to spend any pre-trial time in jail.