I think you're farther down that slippery slope than you think you are. We have more access to foreign voices from outside the country than we've ever had in history. A lot of that is through social media owned by US companies who are not the target of this legislation.

Twitter has been pretty instrumental in swaying public favor to the Palestinians in Gaza despite Israel (a US ally) trying to paint a different narrative. Now imagine if Twitter was owned by an Israeli company. Would we see all those horrific pictures and videos in Gaza? Would we even know if we weren't seeing them? Would we have any legal or legislative options if we did uncover feed manipulation?

I think maybe the reason you aren't fully on board with this is that you seem to have a strong distrust of the US government. More than our foreign adversaries. That's fair and you are entitled to that. The people on the other side of the issue trust the US government more than foreign adversaries and that changes the calculation.