The targeting pods of su-35 are not made by yomz but are procured from french and same goes fo the wide angled HUD.
Not to mention numerous small electronics,,,russians are simply going down if they don't make peace with the west.
Not just that, yes Russia does buy many high tech stuffs/arms/parts etc from us in the West. The thing is, Russia sure made a big mistake trying to go all out/head on against us in the West/U.S. The U.S/west are by far still the most powerful/influential block in this world, so it wasnt a god idea for Russia to go directly against us, well not without them being at least at par with the West/U.S. You simply cant take on the west openly/directly today and prevail(economically,financially etc), not because we are GOD or invicible or whatever. But simply becaiuse we got a head start and are far ahead all other major regions/countries, hence it will have been wise for Moscow to bide its time until its stronger/more powerful enough(or at least wait until it has powerful/big allies to back it up) to be able to take such aggressive measures without much consequences to it.
Russia should come to terms with the fact that its no more the U.S.S.R those days are long gone when they could take such aggressive measures and not be affected by anything we did, since they were as powerful as the U.S back then and had their own block(just like the U.S-WEST). Today things are different. So hopefully Putin will stop supporting his mecernaries in Eastern Ukraine and try and find a peaceful solution to the crisis while openly letting the separatists fighting for him in eastern Ukraine that Russia wont support any such moves anymore. Thats the only way they are going to lay down their arms and sit on negotiating table and be willing to compromise with Kiev, else this wont ever stop and will only get worse, which will also make the west/U.S/japan etc to increase sanctions against Russia even more, thus complicating thhings for Moscow further. Russia should have just stopped at seizing Crimea, it was more than enough for it. but no seems they stillw ant eastern Ukraine. This will be more complex than Crimea. so they should town down their rhetoric.So we can both resume our former partnerships.