Trump, Iran, Israel and the Make America Hated Again story

Is Trump a man of his word who honours his promises, or he is a cheap, fly-in-the-wind, lying, yellow-bellied guttersnipe? Shall I murder an ailing old man or not? Shall I conduct a terrorist strike, bombing an Iranian laboratory in sovereign territory because Israel, which has already attacked a US warship (USS Liberty), has invaded Iran and is getting the crap smacked out of it? Shall I destabilise a country without knowing what the consequences will be? Shall I play with fire and hope for the best, or shall I involve the USA for decades to come trying to curtail the monster I have created?