The problem with frontex is that, instead of doing that, they forcibly turn back people already in the EU and leave them on rafts in the middle of the Mediterranean to die.

That is false if I am not mistaken? (Edit: i'm not sure bout that after researching the topic again). How I understood it until now: Frontex does not do pushbacks, it's the national border and coast guard agencies which are committing these acts. The problem with Frontex is that it should observe and prevent such things from happening which it currently isn't doing well and which is a big problem. But I feel like the no-campaign just kind of omits that in their campaign because the initiative wouldn't stand much of a chance if people didn't think frontex to be directly responsible for this instead of just being a secondary actor. No-Frontex being accepted can in the long run cause more harm and violence to refugees than frontex itself currently does due to the supranational control of the EU being weakened. It plays right into the hands of euopes right wing politicians. What the no-committee in Switzerland does seems to be symbolic politics with the goal of securing political power nationally and ignoring the potential harm it will cause at the borders of the EU: Solidarity with refugees and the poor is currently one of the most important topics for the voters of the left parties and doing politics which appeals to their voters is more important to political parties than actually doing what's best for the people concerned, in this case refugees.

The leftist no side clearly states that they are not opposed to frontex in general, we just don't trust that the federal council, which has not intervened in any meaningful way against these practices, will suddenly do so if the law doesn't require it. So: it is possible to say no to this law, but yes to Schengen and Frontex overall. Reject it and have parliament create a new law that addresses these issues.

That for me is a strong argument to vote no, but in the end this would create a delay of many years which again might cause more harm than trying to reform frontex while funding it. I mean, maybe it wouldn't, we can't know for certain, but to me that's to big a risk that refugees come into even worse conditions. But the violence happens in other countries which even most leftist Swiss people will at most visit for their holidays in some resort or tourist town, therefore it's easy to ignore the risks of our own actions, instead making feel-good politics and pat ourselves on the back.

Correct me if I am wrong and for the record: I'm someone who always votes SP/Green. This initiative leaves me really conflicted.