I haven't asked to be convinced, only to have someone explain precisely what Cruz supposedly did to defeat the Gang-of-Eight bill, and what he did that amounted to a poison pill.
No one has explained it because they can't. It's just a rewrite of history by Cruz, who actually tried to add amendments that would have improved the bill in some ways. And, as video from 2013 showed, he did want the bill to pass.
The article you linked is all about how he tried to improve the bill, and the Cruz poison pill explanations never surfaced until this presidential campaign and Trump's elevation of the immigration issue.
Don’t care. Vote for Trump. Vote for Bernie. Don’t vote. But stop asking for explanations when you write that “you can’t be convinced”.