I'm not totally sure about that.

Maybe Russians outside Russia.

Of course almost everyone thinks war is bad, but many seem to think it's justified - different thing.

There seem to be a wide support for the idea that Russia is threatened (economically and to an extent military) by the global West, and also that Ukraine is not entitled to be independent and also many of the official lies about the background.

Good lies have a nugget of truth in them, and this is the case also here.

Russia's economy is not growing (compared to EU, US), fertility rate is down, the revolution in Ukraine undermines the stability of the Russian regime, the attempted coup in Belarus was also a threat, NATO is arguably expanding - lately as a reaction to the war but nonetheless, EU is expanding into post-Soviet states both offering membership but also trade agreements which undercut Russia's ambition to be an economical hub in the region, etc.

It's like Americans thinking thar what their president is doing is right. Nobody in there is doing anything to stop it.

Often, both are true. It's perfectly legitimate for anyone (Russian or otherwise) to have geo-political concerns (e.g. NATO expansion, Cuban missile crisis etc), but a Russian concerned about NATO expansion may also be very opposed to the extreme option of war as a solution.

War affects an ordinary Russian in very negative ways: the possibility of conscription (w/ risk of injury/death), complications for travel, sanctions on goods and services, and the economic opportunity cost (money wasted on war that could have gone to productive uses, plus reduced economic output due to drone strikes on yandex, wildberries, refineries).

imagine if Putin had said... we are slipping behind the west. They are threatening us. So... we'll double down on research & education. We'll outthink them. We'll shift our economy into an economy that thrives in the future.