I.on [美 ɑn, ɔn, 英 ɒn]介词on often appears as the second element of certain verb structures in English (count on, lay on, sign on, etc). For translations, see the relevant verb entry (count, lay, sign, etc).
I just reckon on balance that in this particular case we should embrace the opportunity to show, as a majority in our country, just how accepting and tolerant we are.