It's pretty simple, actually. Do you hold a Russian passport? You're Russian.
If you "don't support" the invasion and killing, either start changing the system, or get rid of the passport. Yes, it's inconvenient. So are the missiles and bombs falling on the heads of people in Ukraine for them.
> start changing the system, or get rid of the passport
Right after you, my friend, as soon as you singlehandedly stop the US special military operation in Venezuela and extrajudicial killing of people off its coasts, or jail the commanders and mercenaries of EU forces in Syria, Afghan and Libyian war, depending on your passport. Or get rid of it.
And before you deploy your strawman about "terrorists" - that's exactly the same term that has been used by the kremlin to excuse the invasion into Ukraine.
Your illusion of possibility to change the system shall pass soon, rest assured.
Define russian federation first. Am I it? Is it land? Is it government? Is it those zombie mercenaries who execute criminal orders? Is it those who got jailed after protests against war? Is it those who got conscripted? Those who fled the country to avoid that? Those who struggle to meet ends? Those cruising aboard 150 meter yachts?
Who is this elusive mrs. russian federation?