Yes, his idea is support world revolution, but it is not mean that he will always use one method. In his life, he changed his mind many times before he finally stand with Lenin. And I don't think when he seats on the leadership of USSR, he will not going to do industrialization first, and not go to reform military, and not go to purge those opposition, and just go to a "world revolution" in this bad situation.
All of this was the work of Stalin mainly, and it is for the paradox that the principle of communism in one country.
Even after he turned the Balkans to the Community, he did not try to convert Finland, Greece and Italy to the Communists, despite the great support for fear of the West's reaction.
For this reason, he did not support any communist revolution before the second world war
Trotsky will support Republicans in the Spanish civil war, which means red Spain
The red Portugal may mean if the Spaniards launched a invasion of Portugal in retaliation for their national support
In addition, it may finance coups and communists in Poland, Norway, Italy, Finland, Baltic, France, China, United States, Mexico, Afghanistan, Iran and the British Raj
This will be an alarm to Europe and makes everyone turn a blind eye to Hitler's madness to stop the aggressive Communists
In addition, Trotsky was not pragmatic and incompetent
(Only military was efficient)
That is why the alternative history scenarios choose it
When the topic is about making the Soviets detonate the second world war