While I obviously disagree with you regarding the LCMS doctrine I applaud your discernment in the matter. If you are not in agreement, you should not commune. As is outlined in the second link, did the congregation make an effort to draw you out on this or to welcome you to learn more?
Yes, the Pastor and I had some conversations and he knew that I came from a Reformed background so he understood. We never got into any indepth discussions.
I eventually partnered with a Memoralist church that, though I disagree with their thinking on the Lord’s Supper, I happiliy partake.
I think there is a huge difference in partaking with a church that believes communion to be a true sacrament and one that believes it to be merely a rememberance. If a church believes communion to be a true sacrament one ought to think twice about what they are participating in and the ramifications of that participation. I think here of Paul’s instruction that having sex with a prostitute is essentially being married to a prostitute (This is to be taken as a metaphor not that I’m claiming the LCMS is equal to a prostitute). For those churches that believe it is merely a remembrance I think one can still participate even if he believes it to be a true sacrament because I believe one receives the Sacrament by faith even if the other participants do not.
I would have been happy to continue with the LCMS church but it was that one issue that lead me to find another church to affiliate with.