I read his blog and did some research before posting. I'm sure I don't get the intricacies of Swedish politics but anyone talking about the West being invaded by migrants is a big red flag for me. Maybe I would have had more tolerence about it in the past but my home country (US) has masked goons rounding people up and I've gotten burned from so many people who claimed to want sensible migration policies only to turn out to be virulent racists when they got in power.
Also, there are ways to keep companies from using migrant labor to undercut wages that don't involve mass deportation.
You should read my other comments to get a bit more context of why this is an issue in Sweden.
The situation in the US is so absurdly different. It would be like having an opinion on Chinese consumption economics because the local states sales tax was altered. (to use an american example).