Most westerners, even people who otherwise have good positions vis a vis Palestine and other foreign policy issues, have a very David vs Goliath view of politics where they reflexively support the small side against the big side. Russia is a big country invading Ukraine, a smaller country. Russia is more powerful than Ukraine. Blessed are the meek for they shall inherit the earth (even when the meek in question are a US backed far right country that venerates its nazi heroes like Bandera). This is idealism, but it is widespread and organic. It’s only astroturfed in the way that support of capitalism is also astroturfed.