I think we are working to an extremely limited definition of secularism if we think we have established that we all mostly agree with the very limited examples that you gave a couple of days ago.
However, I don't think that you can say that 'secularism is basically just common sense and fairness for all'. That is disingenuous. I know, TD, that you and the Secular Society are not the same thing, but here are their aims:
a) There is no established state religion.
b) There is one law for all and its application is not hindered or replaced by religious codes or processes.
c) Individuals are neither disadvantaged nor discriminated against because of their religion or belief, or lack thereof.
d) Freedom of expression is not restricted by religious considerations.
e) Neither the state, nor any emanation of the state, expresses religious beliefs or preferences.
f) Religion plays no role in state-funded education, whether through religious affiliation, organised worship, religious instruction, pupil selection or employment discrimination.
g) The state does not engage in, fund or promote religious activities or practices.
h) Public and publicly-funded service provision does not discriminate on grounds of religion or belief.
i) There is no privileged position in society or advantage in law for any individual or group by virtue of their religion or belief, or lack thereof.
j) The state does not intervene in the setting of religious doctrine or the running of religious organisations.
This seems to me to be a mixture of classic 'individual rights' discourse and covert pro-atheism. I cannot sign up to a charter that says there should be no organised worship or religious instruction in schools. I have already argued that these things are valuable. It seems to me this programme is aimed, again covertly, at evacuating religion from all areas of public life, and I can't sign up to that either.
It is not that I am threatened by an essentially obvious piece of common sense, but that I do not agree with the underlying premises on which some of the secularist agenda is based.