It’s about a relative pronoun which has two possible antecedents.
In this sentence, “someone like you who is”,’someone’ is the antecedent of relative pronoun, “who”. Why can you explain why ‘you’ cannot be the antecedent of the relative pronoun, ‘who’? I look forward to your answers.
When the antecedent is “someone” Then you find it hard, there are no more antecedent, both. If the antecedent was different, the one
man was unable to go to church and came for you last night.
In theory, an ambiguity could arise.
This is another example of “I am looking for someone like David” (i.e., I could write a sentence like this). “Only good people come out who I like,” i.e., as David is coming out. “I am not one of them. I am wasting my time and energy on this”. like David is ) or “I am looking for someone, like David. who has been looking for a long time now”.
If the noun or pronoun after “like” is the subject of what follows, there should be a comma before “like” (as in my example), but not everyone is fastidious about comma use.
In your expression “someone like you who is”, it could be argued that, if “you” were the subject, the verb should be “are”/ “should go”? In informal English, this rule isn’t always followed after “who” in informal English. Is “Its you who are responsible” just a case of who is responsible?
In an expression like “someone like X who is…”, there is a strong presumption in favour of “someone” being the antecedent of “who” – even unless there is a comma to suggest otherwise.