Why does the game today have to be replayed in it's entirety? Why don't they just resume the game a few months from now at 7-0 in the 5th inning? I remember the Astros and Nationals doing this a few years ago on a game that got rained out in the 11th inning. Anyways, I know there is probably nothing that can be done about it, its just a stupid rule

It is a dumb rule. Other people can chime in who know the details, but basically it takes five innings for a game to be official. After that if a blow out gets rained out they can just call it as a win for the team thats ahead, or they can finish a close game later on. Thats why the Astros game was finished later. It's a dumb rule.

I really don't think it is a "stupid" rule...it's just an attempt at compromise taken to best achieve a set of disparate goals when an uncontrolable event like bad weather occurs:

1) Time concerns - Practical things like fans and travel preclude you from just waiting out the weather indefinitely. At some point, you need to draw an end to the proceedings, either by replaying the game, letting the current result stand or starting the game at the point of delay.

2) How much of a game should be considered "enough" to declare a winner - The rule is at least 4 1/2 innings if the home team is leading. This gives the losing team over half it's at bats, which seems reasonable. Less than half, at least to me, seems like it's not enough, although if the rile were 6 or 7, I think those are equally reasonable, too. If a game doesn't at least get to this point; it gets erased since it's not a "real" game yet. (This is the big difference between this game and the Astros extra inning example you gave)

3) Continuity of the game/importance of starting pitching - Baseball is a 9 inning game where you have a rotation of starting pitchers who don't pitch every day. It's not 9 separate innings or three periods or two halves. To take a game and have it chopped up disturbs this natural flow of the game.

Sure, the Rangers got the short end of the stick on this one, just as they'll be bailed out by the rule at some future point. Again, it's not a "stupid" rule, it's just the best comprimise.

I dont know what the score was of that Astros game...but if the game has gone past five innings and it is tied they willl suspend it and it will be picked up later at the point. Obviously after 5 innings if someone has a lead the game will be called.

That Astros game if the Vistor had taken the lead in the top off that inning it cannot end either the rule reverts a game to the last fished inning, so for example Texas has that 7-0 lead at the end of 5 it goes into the 6th and Oakland takes a 8-7 lead and they call the game before we finish are at bat we would win the game, and it canot be picked up because the last inning did not end in a tie nor is the game currently tied, that's when the rule gets bad.
*They changed this rule for play-off games, because the Rays almost got boned by it in the WS a couple years ago.

I understand some of your positions but I still think its stupid to play 4 innings of a game and then act like they never happened. If you're going to send them out there to play the game, then at least honor the results of what happened in some way. It just seems silly to act like Gio Gonzalez's 7 run inning, or Moreland's grand slam never occured. Just pick the game back up where you left off later.