There are a load of BS claims made in that opinion piece. It is the exact same level of scrutiny and background checks any applicant for an immigrant visa has to go through, no matter the visa category. They may as well scrap all family based visas as this is the category which in fact is responsible for the largest numbers of non- or low-skilled people getting into the country. Or how about student visas? Or any other visa for that matter? It's stupid to be picking on one particular visa category and complain about certain countries of origin for a perceived terror threat in the same sentence, where citizens of those exact same countries are eligible to apply for any other visa, anyway!
I don't mind when they eliminate a big chunk of the family based visa category - where even distant family members can claim family sponsorship and get issued green cards, and instead, allocate these visas to merit based immigration.
However, I also hope whatever they will be doing, they should make it much easier and welcoming to allow entrepreneurs and small business people to come and be given a clear pathway to permanent residency - because currently, there are hundreds of thousands of business owners on E2 visas who have to renew their visa every few years and will never be eligible for a green card based on their business success, and their children (those born overseas) will have to leave the country at age 21 unless they find their own way to gain permanent legal status.