Today WW3 started.
Axis will be China, Russia, Iran and more
Vs
Israel, Canada, America, UK and more.
I don't think this is the beginning of World War 3. China and Russia have not indicated any interest in helping their ally Iran. Russia is preoccupied with its war with Ukraine, while China is focusing on its economic war with the US. I guess they are avoiding direct war with the US. Maybe they might assist Iran indirectly. The outcome of this attack on Iran is just unpredictable.
If Trump actually care more about avoiding any actions that could lead to a ww3 I am very sure he wouldn't have taken such disastrous action on Iran but would have stayed within her indirect support position to Israel just in the manner that China and Russia who are Iran's allies are doing/maintaining their limits of intervention.
Now, was this a Trump personal decision on attacking Iran on behalf of the Israel or is the action constitutionally backed by the US Congress? This something to look into.