To me all prayers are the same: inappropriate in governemnt buildings regardless of the religion.
That's a different situation entirely. But building any building, religious or not, might 'offend' someone near it. Does that mean the building should stop? Not really, otherwise nothing would get built. Would one person's objection stop it being built? Again, not really. If you got 100, or 1000 people that objected to, you'd have a case, but alone? Not so much.
Just because we're a secular society, doesn't mean that religious buildings shouldn't be built.
It seems that it's one rule for Christianity and another for all other religions (especially Islam).
Eric Pickles was right to say that such prayers at council meetings should be allowed to take place.
It should be one rule for ALL religions. None should get special treatment over others. Not you are missing the key point. Christian prayers at a council meeting is giving special treatment to one religion (christianity). Banning those prayers puts all religions on the same playing field. So you're ok with it being one rule for christinity and one for everyone else, as long as christianity gains special treatment as a result.