SD is not a center party. They have been and always will be a far right party with some socialist talking points to get votes from the left. (Sound familiar?)
These people kindly collect evidence of the ongoing racism, authoritarianism and other questionable activities of SD. The Nazis didn't go anywhere, just rebranded
Well they seem to have gone somewhere else now, as the politicians with official positions that committed crimes or made offensive comments seem to have been fired.
Question: where did you get this information or impression? Really curious.
No, they are far right. I think if anyone called them centrists in Sweden, they'd get laughed at.
People in the party still do and say Nazi things despite their attempts to get rid of them. No party wants to have them in government... Right now they are in a coallotion with no government seats because this shit wouldn't fly with Swedish society.
They are anti immigrant, racist, transphobic, and dabble in conspiracy theories.
Edit:
To those who want to understand what SD is all about, here you go, a full list of all their bullshit, cited with links and pictures:
(page in Swedish, but any translation extension should do)