With regard to temporary visas, the article cited a few types of issues. For example the scenario where someone obtain a temporary visa (promissing to return is a part of the application) and then files for asylum once here. This is broadly understood to be an abuse.
More broadly, because HN is a tech crowd we tend to understand that H1-B visas are often used to supplant American labor cheaper (vs - "filling jobs that Americans aren't willing to fill.") The same dynamic is seen outside of tech as well. Representative example: last year we stayed at two hotels in upstate New York. One was a family run operation that hired local teenagers and older people. It was awesome. The next place right next door, is owned by a larger operation and every single employee was central European - recruited over there and brought here to work the hotel for the summer. I don't think that's a reflection of lack of local labor (said teenagers and older folks) but a business strategy (ab)using temporary worker visas for cheap labor. I think Americans intuitively understand that this doesn't benefit Americans - except the business owners hiring the h1-bs and similar.
So because the system is perceived to be abused and not serving the people's benefit most people are fine with a pause and re-evaluation. Obviously there are sympathetic stories of people caught with uncertainty at the moment and we hope it resolved well for them. At the same time this is a sign of a problematic system in place - the fact that someone here on a temporary visa has an expectation of indefinite renewal means we have created and reinforced such expectation and that probably isn't right.