There's a difference between expressing concerns and giving support to the other side. Between criticizing Israel's policies and adopting Hamas's policies.
Its absolutely an alteration in policy, instead of some vague intention to support a two state solution hinged upon impossible premises, its a change in formal policy of France to give Hamas the recognition of Palestinian statehood they've long sought, a change in status quo of international diplomacy that rewards Hamas for their attack on Israel and ensuing war.
France has long supported a two state solution on those premises, which would never come to pass. That a Palestinian state could exist with a disarmed Palestine that recognizes Israel's right to exist, that doesn't threaten its neighbor, that isn't run by terrorists, and has reunified the west bank and gaza. All those impediments to every attempt to resolve the conflict, all intractable, none of which has made any actual progress. What has actually changed? Now the Palestinians have hostages and showed how much their threat to Israel is truly existential.
France is moving ahead with its formal change in policy despite none of those conditions, which means they're giving de facto recognition to Hamas as a legitimized entity on an international stage. A reward for Hamas killing a bunch of Jews.
Netanyahu repeatedly warned this a year ago, that EU countries were looking to reward Hamas for slaughtering Jews. The status quo ante was upset by a Hamas terror attack, and the EU is trying to play out the consequences to give Hamas the political goals it sought from the beginning, which just gives into their terrorist demands and proves their tactics to be effective, which solidifies Hamas's existence. Instead of helping defuse this conflict, they'll just worsen and prolong it. Hamas is trying to stoke a famine right now, knowing that the international furor over starving Palestinians will serve their geopolitical goals. Its the very same basic manipulation of self-destructive western pseudohumanitarian impulses that Putin exploited in the Syrian war
Like pushing a spring: the more pressure you apply to one side, the more forcefully it rebounds the other way.
We are not going to give presents to people who murdered Hews indiscriminately!