I assert that generally, the base is against any form of immigration and is thus against H1Bs. It's not just Bannon. The only acolytes in favor of H1B are Musk and Ramiswamy (already voted off the island). Eventually when the grassroots - whom Trump does listen to - tire of Musk, he gone.
It’s silly to assume the base is anti-immigration. The base wants a relatively secure border and a better process. You can’t even get into Canada if you’ve had a DUI in the past 10 years but we’ll let all kinds of people just wade on in and let them loose. It’s insanity.
As far as the H1B1’s go, tech and finance jobs are usually pretty decent and tons of tech and finance workers have been laid off recently. I don’t have a problem with protecting the people who are already here by not going crazy with bringing in foreigners to do the work cheaper when these companies can afford to pay domestic workers.