There's nothing inherently wrong with pausing immigration visas. These commenters act like anything less than fully open borders and unlimited immigration quotas makes you Satan reincarnate.
They intentionally over-dramatize everything he does to spread fear and alarmism cause that's all they can do. It's so tiring and nonsensical.
Just think of it as the return of the 19th-century Know Nothings or the 1920s nativists if the Nazi comparison makes you squeamish.