I don't think the US cares about Arabs as much as you think. Destroying Arab countries is even good for the US and Israel as it cements the dominant status of Israel in the region even further and it forces the Arabs to spend money on reconstruction, which will most likely be done through American contractors.
But we cannot target the US mainland to inflict heavy damage and we haven't been able to kill American soldiers with our missiles.
The Strait of Hormuz has failed to achieve its main objective: Raise oil prices to unbearable for the world economy.
As I said, during the US-Iraq war in 2003, oil prices even surged to $120. Adjusted for inflation, that is about $217.19 in today's prices. The Strait of Hormuz worked initially, and it may work in future if Iran completely shuts down the strait, but it isn't even remotely similar to a nuke. And Trump is not bending.
If Iran wants to use the SoH as a nuke, oil prices should surpass $200 per barrel or it won't work.