Should the JCPOA have been maintained instead of the ongoing war?

The JCPOA, signed in 2015, limited Iran's nuclear programme in exchange for sanctions relief. The US withdrew in 2018 under President Trump, after which Iran resumed and expanded uranium enrichment. Recent direct conflict between Israel, the US and Iran has resulted in a fragile memorandum of understanding, with critics linking the deal's collapse to heightened regional tensions and war.