There is a divide between Liberals and Leftists. They agree on some issues, but especially on foreign policy they have huge disagreements. Liberals care about social policies which affect themselves, so they will plead for socialist policies which affect them. But American imperialism affect foreigners so they rarely care.
Since Leftists have no party of their own, the are usually grouped in with Liberals. But lately Leftists have been getting extremely angry about Liberals refusing to do enough to stop a literal genocide and have decided that this is a point they are willing to stand their ground and fight on.
This is why this /progressivepolitics was created. The /politics community is for Liberals if that is what you are looking for.
In politics you try to get the person closest to where you are to agree with you. Putting pressure on Republicans is useless, as their other policies are so far removed from the left that even if they start calling it a genocide, leftists do not want to vote for them.