Is it permissible to adopt a weak opinion to unite the community during Ramadhan?

The month of ramadahn usually brings a challenge to our community, everyone follows the opinion that they consider strong and starts the month accordingly. For the sake of unity is it allowed to adopt an opinion that may be considered weak. Like in my community we always differ on when Ramadhan will start, some people want to start with the country that sights the crescent first (usually Arab brothers take the opinion la ibra fi ikhtilaf al matalie), some want to follow local sighting, some want to follow continental sighting (usually south Asians), So as a Imam or knowledable person in the community is it OK to start ramadhan with a group in an attempt to unite the muslims (so we do not give or become the laughing stock of the media) even if the opinion is a weak one like: 1-there is no consideration for a matlaa all over the world 2-It is OK to confirm the entry of a month wholey on astronomical calculations? Please answer this and help is unite.