This is not meant to rule practical halachah; rather it's to show the sweetness of learning. Based on R' Yitzchak Zilberstein's seforim
Q. Lost Souls!
Zalmon owned a restaurant and built a sukkah so his customers could sit down and enjoy their food on Sukkos.
There were other take-out stores next to Zalmon's store, and people who bought food from those other stores who didn't have sukkos began asking Zalmon. “Excuse me, can we eat in your sukkah?"
Zalmon was a happy Yid with a big, warm heart. “OF COURSE! Come in! It's a mitzvah to eat in a sukkah!" How could he possibly tell another Yid no?
Then more people came, and more. Zalmon kept smiling and welcoming them in. Soon Zalmon's sukkah became 'the place' in the neighborhood to come sit and eat on Sukkos.
There was only one small problem: almost nobody sitting there had bought food from ZALMON! It reached the point where his sukkah was FULL, while many of his own customers had to stand and wait for a seat.
Some who wanted to buy from him saw the packed sukkah and simply LEFT!Zalmon looked around: food from the store next door, food from across the street, food from who knows where. His sukkah was doing GREAT! His restaurant... not as much.
There was another side pulling at his heart. Many of the people asking to use his sukkah were Yidden who were not yet religious and were happy to have the chance to eat in a sukkah. If Zalmon said, “Sorry, this sukkah is for my customers first," they might simply eat outside and not do the mitzvah of sukkah at all!
Zalmon was stuck. “What am I supposed to do?” He wondered. “Run a restaurant or a FREE SUKKAH PROGRAM?!"
Who To Ask?
A. Of course to R' Yitzchak Zilberstein Shlita!
Who makes Torah Learning so sweet & geshmak!!!
- If Zalmon knows for sure that these Yidden won't eat in a sukkah if he doesn't let them in, he is obligated to let them in because of the mitzvah of tzedakah, of giving charity.
- The Biur Halacha says that if a Yid doesn't have money to buy tefillin, then every Yid has the mitzvah and obligation to buy them for him because of the obligation of tzedakah.
If a person must give tzedakah for someone's physical needs, then of course he should give for someone's spiritual needs. Zalmon isn't giving away money with his sukkah's, he's only losing profit. He should let them in as a form of giving tzedakah.
- Tosafos says that if a person sees someone doing a sin and doesn't protest, it's as if he did the sin! In our case, if people came over to Zalmon and said they wanted to eat in the sukkah, and he didn't let them in, their sin would be on his account.
In short: Zalmon should let them eat in his sukkah.
Behind The Scenes Of This Question:
At one point, Zalmon saw one of the not yet religious people eating a pork sandwich in his sukkah! He went over to him and said, "Please don't eat a non kosher sandwich in my sukkah."
The person replied, "Judge others favorably. I was for years in freezing Russia, where they didn't let us eat kosher; this is what I got used to eating. Why shouldn't I at least eat it in the sukkah?"
R' Zilberstein ruled that he should not let him eat it in the sukkah. Especially pork, pig meat, according to halacha it is compared to a restroom; a pig is always in filth, and it may not always even be permitted to daven next to it. It is considered a filthy animal; non kosher and spiritually bad things should not be brought into the sukkah; they cause the kedushah to leave the sukkah.