The Muslim vote in Sweden was enough to tip the balance in favor of the left, who will now import even more foreigners and permanently destroy the right's chance at electoral victory.

Note that this is Muslims alone without factoring in all of the other non-Whites, who also vote overwhelmingly left-wing.

The right did do a considerable amount to decrease the number of migrants flooding in, AFAIK most of the Tido Agreement was implemented, and they repatriated some, but they could have done more. They should have:
- had citizenship reform ready from day one
- froze the blacklog of naturalizations (iirc 200k were naturalized which swung the vote)
- stripped/reduced funding for leftist NGOs and public media
- pushed for constitutional changes that could enable them to revoke citizenship more easily
- focused more on economic concerns that appeal to the masses (e.g. immigration increasing cost of living).

The main issue was the pace at which they rolled out anti-immigration policies. It has to be a blitzkrieg.