I'll bite. If I own x product, Paypal for instance, shouldn't I have the right to police who uses it? Why should a site that allows people to say "kill Jews" us

I'll bite. If I own x product, Paypal for instance, shouldn't I have the right to police who uses it? Why should a site that allows people to say "kill Jews" use my product if I don't agree with the message? I understand the slippery slope and maybe 100 years ago they might have banned a site asking for women to have the right to vote; however in the end these are private companies.