This is identical to what TASS released. But I can’t find where they initially pledged their support for the independent Palestinian state. Do you have a source for that?

This is an official statement by the president of Russia as published in TASS which is the official state media. The statement clearly says that Russia's position is that there needs to be an Independent state of Palestine as originally proposed by the UN. I'm not sure what else you're asking a source for here?

I don’t disagree with you on the merits that the resolution passing would be a positive thing, it’s just that it was a stupid show and nothing else.

It's not, this is how the geopolitical process works. Countries propose these resolutions and then they are voted on. The US is now in a minority position and it's forced to resort to vetoes of these resolutions. Eventually, either US will be forced to accept a resolution on a ceasefire or further expose itself as backing genocide by Israel. The political pressure on Israel and its sponsors will continue to grow as time goes on.