Assalaam alaikum sister tearose,
Dawah cannot be given in an environment where religious tolerance is not accepted Not in modern day. Hence, we take steps, lead by example, and other may follow.
wa 3laikum as-salam,
I was quite tired when I wrote that post and I don't think I expressed myself very well. Of course we must be tolerant and kind towards those who are not hostile to us, maintain good relations with them, and lead by example. However, many interfaith initiatives and many personal relationships between people of different religions goes beyond that, to a kind of cosiness, praising each other and trying to please each other. These situations are full of traps.
For example, a family member of mine is a practising Catholic. Recently we were talking about religion, and he spent most of the time praising Islam, praising Muslims, saying how interesting the religion is. Then he made one comment about how interest in studying Catholicism is declining, said 'It's a shame, because Catholicism is a beautiful religion' and looked to me for approval. If I approve, I fall into the trap. If I disapprove, everyone will look at me as the bad person, because he said so many nice things about his religion and I can't even say one nice thing about his. If I stay silent, what's the point of having the discussion.
Then there are people who tell you to have a nice Eid, hope Ramadan is going well for you etc., then they get hurt when you don't wish them a Happy Christmas.
If you never debate with them, or talk to them seriously about the message of Islam, how can leading by example be effective? If you are constantly interacting with them in a way that reassures them that you accept them and their ways(whether you mean to do so or not), all they might learn from your example is that you are a nice person and that your faith is an important part of that. It doesn't necessarily motivate them to take it seriously.
I learned this the hard way, when after months of thinking I was 'leading by example' my mum told me that she didn't realise Muslims thought Islam was for everyone, that other ways of life could be true for other people. This made me realise that unless you insist on the fact that Islam is the only true way, people can easily miss the message. It also becomes very easy to confuse showing others you are a good person with striving to please them.
Please note this
doesn't mean being disrespectful to others or talking to them in a harsh way, but just don't fall into these traps and never stop calling to the truth in a way that makes clear what is at stake.