I see it is this post you are referring to regarding contradictions.
1."Let there be no compulsion in religion: Truth stands out clear from Error: whoever rejects evil and believes in Allah hath grasped the most trustworthy hand-hold, that never breaks. And Allah heareth and knoweth all things," (2:256).
Clearly this is talking about no-one in Islam is allowed to force someone to be Muslim. Muslims may or may not adhere to this, and either way it does not change the prohibition to forced conversion.
2. "And an announcement from Allah and His Messenger, to the people (assembled) on the day of the Great Pilgrimage,--that Allah and His Messenger dissolve (treaty) obligations with the Pagans. If then, ye repent, it were best for you; but if ye turn away, know ye that ye cannot frustrate Allah. And proclaim a grievous penalty to those who reject Faith," (9:3).
I see no call here to "force" people to convert. A contradiction would be "in religion you must compel conversion to Islam".
3. "But when the forbidden months are past, then fight and slay the Pagans wherever ye find them, and seize them, beleaguer them, and lie in wait for them in every stratagem (of war); but if they repent, and establish regular prayers and practice regular charity, then open the way for them: for Allah is Oft-forgiving, Most Merciful," (9:5).
Again, no insistence to convert to Islam, just an insistence to stop killing Muslims, and be charitable for once please. Pagans were clearly not too friendly to Muslims, as per the history with Sumayah and those murdered after her before a Muslim had laid hands on any soul.
4. Fight those who believe not in Allah nor the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the Jizya with willing submission, and feel themselves subdued," (9:29).
Please read the whole of Surah 9. This is not a call to "compel people to become Muslim". It's a call to defend and fight against those who are breaking a treaty. "They do not observe toward a believer any pact of kinship or covenant of protection."
