What should they do?

How?

Why should we not make russians who support genocidal imperialism (both conceptually and as implemented by their leaders) responsible? Are they children? Of course they should pay for their actions.

How would you sort those who support war from those who don't?

Glue is what keeps us together!

No. Stop your government right there, while you still can.

Or else you'll have the same shit we have here in Russia.

I'm a Russian.
Even if NATO has aggression in mind, that doesn't justify current war. There's hypothetical aggression / geopolitical threat and there's real one.
Current war brings nothing, but a shame and death and is throwing both countries under the bus - all for some delusions of old ex-KGB maniac.

Secret of passivity of an average Russian is in eternal "maybe" in our heads: maybe government won't notice me, maybe I will be spared, maybe a situation will fix itself somehow. We even have special term for it: "авось".
It's all learned helplessness.

As for me personally - I have decided that if they will try to conscript me then I will try to flee or go to prison rather than actively participate in that war.

If you are too afraid and unwilling to fight back against the architects of your current torment, are you not already imprisoned?

That's a lofty sophism. There's a huge difference between some philosophical imprisonment and a real one.

Most of us just afraid. There're more and more cases of prosecuting people for "discrediting Russian army", for refusing to be conscripted and so on.
Fear of going to prison is almost in genes, due to the loong history of being heavily oppressed by own government.

Train it on CP and similar awful stuff

Good luck with explaining storing of that material to law enforcement agencies

His appearance is irrelevant. There's plenty of us ugly guys here. But not everyone is such a jerk.

Well, I know even more crazy people, who hate masks! Now what.