The strong point of the Swiss political system is that the government is, by (EDIT) convention, made up by all significant parties. No major political force can say “if only we were in power...” because they already are. Also, no party can create disasters and then disappear and leave the consequences to the following election winners to deal with.

This referendum is an attempt by the members of SVP/UDC, the right-most party, to show that on immigration topics they have more popular support than what their relative power in the government is. Their proposed solution is very crude, on the other hand the opposition parties' position is basically “do nothing, everything is going fine”. I would have hoped the government to offer some kind of compromise proposal (which they are allowed to do and appears as third option in many referendums), but it seems the Swiss citizens will be faced with a “all or nothing” choice.

As a novel immigrant, as much as I appreciate the political system of my new host country, I was quite disappointed by the referendum campaign from both sides. Most of the propaganda concerning this vote has emotional and apocalytic tones (“the immigrants will steal our welfare and overpopulation will transform Switzerland into Kowloon” vs “we will become a pariah state, our pensioners will die unassisted due to the lack of nurses, EU will tariff us to death”).

> This referendum is an attempt by the members of SVP/UDC, the right-most party, to show that on immigration topics they have more popular support than what their relative power

Not really about immigration but EU relationship. Almost every SVP initiative tries to create a contradiction in the constitution with foreign agreements to force an "exit".

> The strong point of the Swiss political system is that the government is, by law, made up by all significant parties.

It's a tradition, not a rule (the composition of the council is simply the result of an election by the parliament).

https://en.wikipedia.org/wiki/Magic_formula_(Swiss_politics)

Yeah, the marketing for this referendum has been awful. But as a mixed-heritage Swiss-American (continental Indian), I’m also sympathetic to the argument that some geographies and political systems have a natural maximum population they can sustain. (Unsurprisingly, the SVP’s marketing may be the thing that tips me against this.)