By that logic a tire manufacturer should do the same.

You're really grasping at straws here. CERN doesn't need to do anything. Nor do universities, for example.

CERN is explicit about something they know isn't true. They could just say nothing.

I'm fine with CERN, its scientific mission and whatever they come up with there and have contributed to their cause in a minor way so I can do without the lecturing.

If you do research it is easy to stick your head in the ground and pretend that as an academic you have no responsibility for the outcome. But that's roughly analogous to a gun manufacturer pushing the 'guns don't kill people, people do' angle. CERN has a number of projects on the go whose only possible outcome will be more powerful or more compact weapons.

For instance, anti-matter research. If and when we manage to create anti-matter in larger quantities and to be able to do so more easily it will have potentially massive impact on the kind of threats societies have to deal with. To pretend that this is just abstract research is willfully abdicating responsibility.

Once it can be done it will be done, and once it will be done it is a matter of time before it is used. Knowledge, once gained can not be unlearned. See also: the atomic bomb. Now, CERN isn't the only facility where such research takes place and I'm well aware of the geopolitical impact of being 'late' when it comes to such research. I would just like them to be upfront about it. There is a reason why most particle accelerators and associated goodies are funded by the various departments of defense.

Your typical university research lab is not doing stuff with such impact, though, the biology department of some of these are investigating things that can easily be weaponized, and which should come with similar transparency about possible uses.

Antimatter would also revolutionize energy production...

Not necessarily. Making something go boom is a lot easier than making that same thing make controlled energy over a longer period of time.