There was a reason more intelligent former American presidents never went to war with Iran but preferred diplomatic solutions.
Trump said during Obama's regime, Iran threatened to attack US but because the United States President don't want to war the Iran maybe because he was some sort of coward whom in his kind of person underrated his capacity to withstand such an alarming conflict with the Iran.
He also said Biden was a wickly who could not stand firm to protect the US from the terrorism of Iranian governments.
He claimed those past US governments out of their incompetences to withstand the forces of Iran had to pay Iran huge amount of dollars as a means to curb the tensions of threats and vow not to act like those past regimes.
So his claim to be different and his arrogance as you may call it gave him the morale to attack the Iran instead of paying them like the past regimes did.
Come to think of it, sometimes courage to face your fear is the right instrument to bring solution which using weapons may be an option as much, negotiations might be undermined and assumed to be an underdog.
What you see in those contrasts are just political games but my heartfelt for innocent people who are being affected.