I was thinking more serious things than sanctions. For example, if Iran launches a cyber attack on the west like the Saudi-Americo wiper attack we shut off their internet for a few days. Hack our infrastructure, we shut down the whole power grid.
Russian used a nerve agent in London and not much happened. They’ve also annexed part of a sovereign nation in Europe. The last time that happened WWII started. They likely provided chemical agents or technical know how to Syria. The Saudis do whatever they please.
Still, there was much more pushback against Russia before Trump took office. Sanctions hurt their economy and Russia was forced to sell from their gold reserves to defend large dips in the ruble's value.
Ukraine is 100% part of Europe, as per any conceivable map or definition of Europe.
Smarter and more experienced people than me need to draw the lines.