Your reply had nothing at all to do with his comment.
You're getting all of this from a few cute pictures and offhand comments about an intentionally ambiguous game ending?
Are you sure you're not the one who's confused? It's pretty obvious that you have 3-4 individuals who prefer to ship Ike with other male characters, and that Ike-sama is distressed by their insistence; to him it is nonsensical, due to the fact that they gave Ike a son (or even a grandson) in Awakening. It obviously offends him quite a bit, and I'm not too keen on it, either.
Even though I don't see any reason to believe that Ike has any canon basis for the yaoi, that has never been a traditional boundary for people who fantasize about one thing or another.
I don't like name-calling, but I also don't like 4 against 1, egging the guy on. Some of us are more willing to be considerate. I think the issue should be left alone. I've been in many character forums on this site -- male, female, non-human -- I have never known Smashboards to be a place for shipping, fanfics, or sexual discussion of any kind. At least not in the character-specific forums. Maybe you guys have a fanfiction forum on this site, near the bottom somewhere? Most forums do. That would be the appropriate place for these discussions.
Just like it would be inconsiderate of Ike-sama to go into the Kirby forum and start talking about how "hot" it is when Kirby swallows people... Just like it would be inconsiderate of IsmaR to go into the Samus thread and start talking about Samus getting frisky with slime monsters or Ridley or her doppleganger, etc... Many people would find that OUT OF PLACE and possibly offensive. I know I would. The same goes for Ike, or any character.