Re: The name Umer according to Shia's??????
^ history is pretty much subjective. It all depends on what you believe is authentic and what you believe is made up. hence i dont think we can accuse ppl of hard headedness simply for believing in a different version, especially considering they dont consult the same sources for history in the first place.
As for the topic at hand the simple answer to the question is shias believe the right of khilafat was taken from Imam Ali (As) by force and hence do not hold the first three caliphs in high regard. That much is common knowledge.
At the time of Imam Ali (as) these names were quite common arab names, so to say Imam Ali named his children specifically after these personalities is mere conjecture to say the least. However that said, even at that time of political conflict, Imam Ali stayed as a close advisor to the previous caliphs for the sake of the ummah, hence despite the differences, there weren't at each other's throat as such. That came later on down the line, from the time of caliph Muawiyah and yazid and the ummayads/abbasids rulers that came later on.
It was then the persecution of the shias became widespread, to the extent that the Imams were under house arrest for most of their lives, a majority of them were murdered, and shias identifying themselves as such at the time were putting their life in jeopardy, (hence the reason taqiyyah came about).
That was the era the shia/sunni relationship drifted even futher apart and became more intense in their dislike and intolerance to each other. The affects of those time is pretty evident today, where the same mentality can be seen in the bombings of shia mosques in Pakistan and the calling of them kafir and in shias verbally attack the caliphs and refuse to name thier kids as such, for what they put the Imams and shias through in the past and to some extent the present.
Although, the situation has come along way since then, it will take a while to undo what the ummayads instigated back then, it has become so entrenched in the common mind set it will be long time before we realise that we've been fighting each other over nowt but our huge ego's.