Unfortunately, a vocal minority of conservatives push policies and attitudes that the Democrats can use to convince minorities that Republicans have no use for minorities. When this happens, it creates a wedge between minorities and the Republican party.
Hispanics want to work and create prosperity for their families. But the attitude pushed by some that they just come here for welfare benefits alienate them. Blacks want equal treatment, a goal that has traditionally been one of Republicans. But the attitude that they just want special treatment pushes them away'
Those attitudes are not conservative, nor are they Republican.