I generally agree with those who say tariffs are not good economic policy. That said, a couple of qualifications:
1. As has been noted previously in the thread, many nations including the US and European countries already have longstanding tariffs that have persisted throughout the entire era of globalization and "free trade." I believe the US has increased some tariffs for strategic/parity reasons during the Biden administration (naming the administration just for identification/time-period purposes - not trying to make a partisan point here), to help enable some US industries to compete with foreign competitors for various reasons. So tariffs are not an all or nothing proposition when it comes to economic policy or a national economy's health.
2. My understanding of things like the "60% tariff on all Chinese goods" is that an Executive Order enacting such a measure would have an effective date of 9-12 months out, and it would be used as a bargaining document to initiate negotiations. So a scenario in which the US imposed huge - and, frankly, insane - tariffs on most or all Chinese produced goods, and China imposed similar retaliatory tariffs is certainly possible, but I don't think it's the most likely scenario.
Part of the difficulty I think we are all reckoning with, across whatever our personal political leanings might be, is the inability to figure out what threats and claims might be negotiating gambits, which ones might be actual intentions, and which ones might be just stuff that is said for short-term reasons but might not be followed through on in anything resembling what's currently being claimed. There's a pretty wide range of the unknown here at the moment.
On a related note, my only real source of hope regarding the nationalist turn in economic policy worldwide is that technological advances are progressively enabling the small- and medium-scale manufacturing of many types of goods, and so in my view there is a possibility that negative impacts of increased protectionism can be partially absorbed by a further dispersion of manufacturing capacity across the world. Put more simply, I think there's an emerging opportunity for more different things to be made in more different places, turning "national self-sufficiency" into more of a "not realistic but we can kind of sort of get partway there" thing instead of a "total insane pipedream" kind of thing. And the more places more things are made in, the more options there are for buying (or not buying) from any one place.