Look at the absolute morons in this thread making similar "I thoughtttttt" arguments. You're better than them and better than that sort of lazy shit posting.
No, it was never a prominent message (let alone one that dominated the conversation) that illegal immigration was good. It was a prominent message that its damaging effects were massively overstated (if not outright fabricated), that the overall effect is closer to fiscally and political neutral, and that therefore the aforementioned effects don't come close to justifying spending hundreds of billions on further fortifying the border and conducting intrusive and inefficient immigration raids that threaten civil liberties of citizens and noncitizens alike. Of course, it's also true that migrant workers have and will continue to occupy job that citizens refuse to do, but that's more of an anecdotal discussion rather than one that should really determine immigration policies.
The fact of the matter is that "Democrats want open borders" was always going to be right wing propaganda no matter how anti-factual it was. Republicans said it during the Obama years despite Obama being the strongest border president of the modern era and drawing a great deal of ire from the left and the immigrant community. And they'll keep saying it. No matter what.
It was, and we all saw it.
Obama was a great president on immigration (a fact I've given him props for, numerous times on this forum), but the tide turned a lot from 2008 to 2016, and certainly post-2016, and people among the left actually started to see his legacy on immigration as a negative rather than the huge positive it should've been treated as. The arguments he made from 2006 to 2010 on immigration would definitely be seen as harsh and cruel, and nationalistic, the same way even Bernie Sanders's 2016 arguments on immigration were seen as overly "harsh", with him changing his tone a lot by 2020 to be more pro-immigration, staying very quiet on the obvious ill-effects that uncontrolled immigration has on labor (which he was previously very vocal about).
Numerous times I had to argue the point, on this very forum, against liberal and left-wing posters that illegal immigration is
not good. The same arguments were being repeated, that illegals were a boon to American society, that they did not drive down wages, that there were zero problems resulting to criminality within those ranks, etc. making it seem like there was absolutely no problem with it. You don't just erase that from memory now that there's a shift back to "normalcy" due to Joe Biden.
Now that the party is in power, pragmatism is once again prevailing over idealism, which is to be expected. It always does. That's why Joe Biden is in there instead of someone younger, fresher and more "progressive". But that doesn't mean the previous 4 years of rampant, ignorant and naive idealism did not occur. It did, we all saw it, and there's no "calling it back" now. Just own up to it and you'll make it easier on yourselves, just like the right would make it easier on themselves by admitting that they went along with the Trump circus. It was easy to go along with the carnival atmosphere of the past 4 years and many people did, that's just how it was.