One of the few issues that unites the American right and left is contempt for the current Iranian regime. Boomers hate it because of the events of 1979; right-wing Christians despise all Muslims; and liberal democrats have issues with a repressive, reactionary, autocratic state. Everyone here would like to see it go.
The divisions in this country are purely pragmatic. The left, and the genuinely “America First” faction of MAGA, think the costs of regime change outweigh the benefits. Trump, Bibi, and Lindsey obviously don’t agree, but they have been unwilling to match the objective with the means necessary to accomplish it–namely, a massive ground invasion. As a result, the regime will conclude the war stronger, not weaker.