If Israel is an outpost of Western colonisation and imperialism then you could make the same argument with the whole of the West especially the US; clearly isolationism is detrimental and to be avoided where possible as the PRC learned from USSR mistakes not withstanding slowing down the path to a hot WWIII.

Addendum for anyone still lurking - the West has orders of magnitude more death on its hands including every single death due to the ongoing genocide and ethnic cleansing from Nakba onwards. If you wanted to choke Israel’s material ability to commit crimes against humanity then you need to choke the West; China has made great strides in tech and warfare but it is a tall order to ask accelerate WWIII, fight it and win it with minimal loss of life for China and the Global South. However, this reality makes a solution of ending more deaths immediately more bleak (10s of 1000s of children are being purposely starved to death as we speak). It makes the work and fight of the Palestinian resistance and others like Yemen even more commendable. You can’t fight sociopaths with placards and rallies alone.