I am living proof that that philosophy works.
In 1980, at the request of the State Party I re registered at my office and ran against Richard Alatore for the State Assembly with no chance of winning in the district that was 26% Republican registeration in order to keep his hugh war chest from being spread amongst several Assembly districts where it could do some major damage. The biggest portion of the district being East LA with a high percentage on welfare.
I ran a strictly hard core conservative Republican campaign and received 39% of the vote, the highest any Republican ever received in the district in a regular election.
Those people will come over to our side if the issues are properly presented to them.