aries2756 wrote: “You can’t tell them not to come…”
According to the halacha one must rebuke someone for doing something wrong if what they are doing is an issur d’oraisa, (a prohibition by the torah) even if they know that the person may not listen to the rebuke. The fact that the transgressor may be trying to get a taste of shul or Judaism or beginning the tushuvah process is not a justifiable reason to ignore public chilul shabbos.
Of course one should carefully plan the method and wording of this rebuke so as to accomplish the most possible effect. If done correctly, with the correct amount of sensitivity and expression of love to all Jews, it will not only not “distance” the offender from Yidishkiet but may, if not immediately, maybe later on, actually have a positive effect.
May we be zoche to see all of our lost brethren returning to the ways of Hashem with shmiras Shabbos and keeping all the Mitzvos properly.