This ended when the most conservative wing of the party, the social democrats in Germany and other nations had just recently gotten the right to have a political party and they didn't want to be viewed as unpatriotic, so they voted for #WWI . The majority of leftists viewed the war as a war between monarchs that would decimate the working class. Which it very much did.
But the social democrats voted them into a bloody pointless war that wrecked Europe as the most expensive royal family feud in modern history. It is unknown whether this shaped Lenin's view of things but he didn't overthrow the czar, he overthrew an elected but dysfunctional government where a large minority were some flavor of leftist who voted to keep the war going, instead of try to end it, like what Lenin did.
Sadly Lenin and Trotsky were a complete outsiders to aristocratic negotiation and were utterly humiliated by their former German allies when thy tried to get the country out of the alliance causing them to lose 1/3rd of the Russian territory. They were only lucky they got it back at the end of the war as part of the deal was that Germany return all of their seized land including their colonies.
The world powers then helped back and fund the monarchist white army causing a civil war in Russia, including some US troops being deployed to help them fight by Wilson though the deployment was less than a year.
This impacted Lenin and #Trotsky deeply making them more paranoid and less trustful of foreign governments because they had never been given any good reasons to do so and the rest of the world tried to flood the nation with propaganda, funded by monarchies and giant corporations, so #Lenin and later #Stalin cracked down on the freedom of the press.
Nothing Lenin or Trotsky did were in a vacuum and everything they did made logical reasoning based on the world at the time. Sadly that set the #USSR for the rise of Stalin making it an authoritarian nation until his death on a level never seen before in modern history.



