Dalbirk ji
You are right in my own personal experience. I am reluctant to talk about Skihism even when asked. There is a tradition of not preaching and not proselytizing -- and that is why. I find myself more talking about it but always worrying that it may sound like I am doing missionary work. That may be a concern for other people.
The problem is that Islam and christianity have given such a bad name to missionaries That other religions are now hesistant to preach.I don't think that in sikhism there was no tradition of preaching.here is the vaar of bhai Gurdas ji
Vaar 11 Pauri 29 Names of the Sikhs of the sixth Guru
Vaaran Bhai Gurdas :Vaar11Pauri31:SearchGurbani.com
In village Suhanda is Bhai maia of lamb caste who sings the holy hymns in the holy congregation.
Line 1
ਚੂਹੜ ਚਉਝੜੁ ਲਖਣਊ ਗੁਰਮੁਖਿ ਅਨਦਿਨੁ ਨਾਮ ਵਖਾਣੀ ।
chooharh chaujharhu|akhanaoo guramukhi anadinu naam vakhaanee|
Chuhar of Chaujhar caste from Lucknow is gurmukh who remembers Lord day and night.
Line 2
ਸਨਮੁਖਿ ਸਿਖੁ ਪਿਰਾਗ ਵਿਚ ਭਾਈ ਭਾਨਾ ਵਿਰਤੀਹਾਣੀ ।
sanamukhi sikhu piraag vich bhaaee bhaanaa virateehaanee|
Bhai Bhana of Prayag is a close Sikh who earns his livelihood.
Line 3
ਜਟੂ ਤਪਾ ਸੁ ਜੌਨ ਪੁਰਿ ਗੁਰਮਤਿ ਨਿਹਚਲ ਸੇਵ ਕਮਾਣੀ ।
jatoo tapaa su jaun puri guramati nihachal sayv kamaanee|
Jattu and Tappa, the residents of Jaunpur have served in accordance with Gurmat with stable mind.
Line 4
ਪਟਣੈ ਸਭਰਵਾਲ ਹੈ ਨਵਲੁ ਨਿਹਾਲਾ ਸੁਧ ਪਰਾਣੀ ।
patanai sabharavaal hai navalu nihaalaa sudh paraanee|
In Patna Bhai naval and among Sabhaervals Nihala is a pious person.
Line 5
ਜੈਤਾ ਸੇਠ ਵਖਾਣੀਐ ਵਿਣੁ ਗੁਰ ਸੇਵਾ ਹੋਰੁ ਨ ਜਾਣੀ ।
jaitaa saytd vakhaaneeai vinu gur sayvaa horu n jaanee|
One wealthy person is known by the name of Jaita who likes nothing except the service of the Guru.
Line 6
ਰਾਜ ਮਹਿਲ ਭਾਨੂ ਬਹਿਲੁ ਭਾਉ ਭਗਤਿ ਗੁਰਮਤਿ ਮਨਿ ਭਾਣੀ ।
raaj mahil bhaanoo bahilu bhaau bhagati guramati mani bhaanee|
Of Rajmahal city is Bhanu Bahal whose mind is absorbed in the wisdom of the Guru and the loving devotion.
Line 7
ਸਨਮੁਖੁ ਸੋਢੀ ਬਦਲੀ ਸੇਠ ਗੁਪਾਲੈ ਗੁਰਮਤਿ ਜਾਣੀ ।
sanamukhu soddhee badalee saytd gupaalai guramati jaanee|
Badali Sodhi and Gopal, the rich persons understand the Gurmat.
Line 8
ਸੁੰਦਰੁ ਚਢਾ ਆਗਰੈ ਢਾਕੈ ਮੋਹਣਿ ਸੇਵ ਕਮਾਣੀ ।
sundaru chaddhaa aagarai ddhaakai mohani sayv kamaanee|
Sundar Chaddha of Agra and Bhai Mohan a resident of Dhakka have served and cultivated the true earning.
Line 9
ਸਾਧਸੰਗਤਿ ਵਿਟਹੁ ਕੁਰਬਾਣੀ ॥੩੧॥੧੧॥
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So at the time of sixth Guru There were sikhs even from dhakka which is very far from Punjab.Without preaching Gurmat It was not possible that there were sikhs from various parts of country