Your original post was at least Rubio could beat Hilary, implying Cruz could not. I showed you links to polling that shows your assertion is not correct.
as for Cruz vs Sanders
http://www.electionprojection.com/latest-polls/national-presidential-polls-cruz-vs-sanders.php
http://www.realclearpolitics.com/epolls/2016/president/us/general_election_cruz_vs_sanders-5742.html
THey show it’s close, but Cruz is up by 1 point in the most recent polls that I found.
Look. Cruz squeaked by in Iowa where Evangelical votes rule. One thing he did prove is you can tell the ethanol lobby to pound sand and still win. THAT’S how big the Evangelical vote is there.
The rest of the country has a small fraction in that demo.
If you see a path for Cruz given these facts, enjoy.