This was always a concern with our team, because IT can be taken out of his game so easily.
Yeah which is why he was their leading scorer 17 games in a row.
And has been a primary reason why we have lost the last 6 quarters...
Easy to do things in the season. How was IT again in the playoffs last year when he was taken out of his game?

Please, an exaggeration he was their leading scorer in the playoffs and their ONLY scorer. You're ragging on him for be the leading scorer on the eighth who got swept by the best team in the east. Where was his help? Where was Bradley? Crowder? Turner? When the Cavs were honing their defense on him, how come others didn't step up. If they did, it would take some burden off him.
Yeah, real impressive when you're the leading scorer shooting 33 fg% and 17 3PFG%. 
It just shows what his role truly is: a sixth man volume scorer.
Sixth man?! The man is averaging 22 and 6 is this season are those sixth man numbers?
Yes, he is ideally a sixth man. His size and defense are too big of a disadvantage and his game is too easy to game plan for to be a legitimate starting point guard on a contending team.
I disagree.
Hes more than a sixth man and can certainly be a starter. When he is taken out of his game, we cant afford to see everyone else be garbage too.
Where was Jae? AB didnt generate any offense, Turner was garbage, Kelly was garbage, neither Sully nor Amir did jack.
IT is not really the problem.
Hes not Chris Paul or Steph obviously, but to say hes not starting caliber is too much.
Sure, he's starting caliber on THIS TEAM (at least this year - Smart should take back his starting position next year). But can you really say that he's an ideal starting caliber point guard? No, his game is totally tailored to be a sixth man, which is why it's his ideal position.
You are completely wrong.
The reason why he is such a dangerous scorer is because he is so DIFFICULT to gameplan against. He's a guy who can score in just about ever imaginable way. He can hit the three, he has a deadly midrange game, can shoot off spot-ups or off the dribble, can get into the paint and finish at the basket, gets to the line at an elite rate, makes his free throws at an elite percentage, etc.
Isaiah Thomas is probably one of the top 5 scorers in the entire NBA for all of the above reasons. I'm not talking in terms of pure scoring numbers, but in terms of scoring talent/skill/ability.
The guy has been on an absolute tear since the All-Star break and has been nothing short of elite. The game today was a terrible effort, but you can't blame Thomas for that - one or two bad games in 20 is hardly something to get frustrated about.
Putting a lanky, athletic defender on him isn't exactly rocket science. Pretty much every time that has happened IT has been limited - Shumpert, Livingston, MCW, etc. He's struggled against every single one of those guys. Further, it's amazing that more teams don't do it and then take advantage of him offensively more often.
Im also quite surprised more teams dont do that. Especially when AB can be gaurded by most pgs due to his size.
I understand the frustration with IT, as these last few games hes been quite bad and its crunch time. The concern with IT was always going to be that when it comes to crunch time, hes going to be exposed as a gimmick.
That being said, I think I disagree with this sentiment.
you say hes not an ideal starting 1 and hes not. id rather have Chris Paul, Steph, Russell Westbrook, Kyle Lowry, John Wall and Lillard.
I think IT is next. Ahead of Kemba, Teague and Jackson. I dont think that list is absurd either.
Its quite reasonable to call IT the 7th best pg in the league. That seems like starting caliber to me.