Fact Checker Time:
1) The Voting Rights Act of 1965 passed the Senate by a margin of 79-18, with 3 abstensions. 49 Democrats voted for it, 16 voted against it. 30 Republicans voted for it, 1 voted against it. (
https://www.govtrack.us/congress/votes/89-1965/s178)
In the House, it passed 328-74, with 19 abstensions, 218 Democrats for it, 54 against it, 109 Republicans for it, 20 against it. (
https://www.govtrack.us/congress/votes/89-1965/h107)
The Civil Rights Act of 1964 passed the Senate by a 73-27 margin, 46 Democrats for it, 21 against it, 27 Republicans for it, 6 against it. (
https://www.govtrack.us/congress/votes/88-1964/s409). In the House, it passed by a margin of 289-126 with 4 abstensions, 152 Democrats for it, 91 against it, 136 Republicans for it, 35 against it. (
https://www.govtrack.us/congress/votes/88-1964/h182)
2) The Equal Pay Act of 1963 passed the House 362-9 with 62 abstensions, 201 Democrats for, the only 9 votes against, 160 Republicans for it with none against it. (
https://www.govtrack.us/congress/votes/88-1963/h29)
For some reason, I cannot locate the Senate breakdown.
3) The 15th Amendment, which granted blacks the right to vote, passed the House 144-44 and 35 abstensions, and the Senate 39-13 with abstensions.
The House Vote breaks down as follows: 144 Republicans for it, 0 Democrats for it, 39 Democrats and 5 Republicans against it. In the Senate, it was 39 Republicans for it, 8 Democrats and 5 Republicans against it.
4) The 19th Amendment, which granted women the right to vote, passed the House 304-89. Republicans voted 200 for, 19 against. Democrats voted 102 for, 70 against. It passed the Senate 56-25, 36 Republicans for, 8 against, 26 Democrats for, 17 against.
5) The Social Security Act of 1935 passed both House overwhelmingly (
http://www.ssa.gov/history/tally.html) during FDR's first term, when Democrats had a super majority of both houses of Congress. With that said, it can hardly be asserted that Republicans were "against" this.
6) Medicare, aka the Social Security Act of 1965, passed with Republican opposition in both House, while Democrats held a super majority in both houses (
http://www.ssa.gov/history/tally65.html).
7) The Fair Labor Standards Act of 1938 passed the Senate 52-28 and the House 314-97, and once again 291-89 after Senate amendments were made. As I cannot locate the vote breakdown at this moment, I cannot comment on that but only to say that this was during FDR's second term and Democrats still controlled both house of Congress.
8) The term "segregation" is rather ambiguous and unless I know which specific kind of segregation you are referring to I cannot make fair comments.
In closing, to reply to your statement:
And what did Republicans do with all of the above ... opposed every one of them. Imagine life in the USA right now with none of these passed ... Republicans could!
This assertion is rife with your usual partisan hyperbole, however, it is not an accurate reflection. The Republican Party isn't perfect, but they certainly aren't the monsters that you so often paint them to be.