Respuesta :
He didn't really have a problem with him being there but if Romeo tried to cause a scene then Lord Capulet said Tybalt could deal with him.
When Capulet finds out from Tybalt that Romeo is at the party he tells Tybalt to leave Romeo alone. When Tybalt says that he will not stand to have Romeo there Capulet becomes angry and eventually tells Tybalt to stop talking about it. Tybalt vows vengeance on Romeo's transgression.