How does anyone know what Sheldon's political beliefs are?
From his website:
Some Things I Believe In
Democracy
Duty
Equality
Exogamy
Family
Freedom
Justice
Kindness
Law
Love
Loyalty
Mathematics
Science
Truth
Some Things I Do Not Believe In
Angels
Astrology
Death Penalty
Devils
Elves
Faeries
Gods
Leprechauns
Luck
Magic
Racial Purity
Not exactly political.