Sanctions and support are MUCH different than antagonizing Russia, a nuclear power, by doing the one thing that if the U.S. did not do would ease tensions greatly.
You do not have to be a Russian apologist to understand that this is more complicated than bad vs good.
And it was only a mistake because they trusted the US and Europe that they would keep the promise of not surrounding them with NATO forces.
What Russia and Putin have done is nothing short of a war crime, just like when the U.S. invaded Iraq, but that does not mean we should blind ourselves to their side to do everything we can to avoid war.
Peace come with understanding.