I can't speak for others, but personally my opposition to tarrifs is mostly for practical reasons: they discourage commerce and competition, reduce economic growth, and harm small business with burdensome compliance costs (just ask any vendor on this board). They also increase prices, a particularly unfortunate outcome as most of the world is currently facing the worst inflation in 40+ years.

Overall, tarrifs have an extremely poor track record of providing the intended benefits but they always come with significant negative externalities.

In this case, the tarrifs are also being used to (partially) backfill an enormous revenue gap that our politicians have blown in the U.S. gov't's budget by handing out enormous tax cuts to centimillionaires, billionaires and multi-billion dollar corporations. So, the tarrifs have the practical impact of redistributing the U.S. federal tax burden down the socioeconomic ladder, increasing the burden on those who already contribute a greater proportion of their income in taxes.

All in all, I think tarrifs are a garbage way for any gov't to try to raise money. But, that's just my opinion.