A majority faction is generally more difficult to control in a
standard democracy because, with one vote per person, they will
overall have more votes than a minority faction, therefore their
ideas will come into effect. To stifle a minority faction one must
merely outvote them, whereas, oftentimes for majority factions you
must spread the vote to many smaller (state) governments. This is
where the "Republic" form of democracy was suggested by James
Madison, which allows representatives to make informed decisions
rather than fall to "schemes of oppression" of the majority
people.
So, in short, majority's harder to hold back. You just have to
outvote minority.